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Configuration Guide
For Use with Red Hat JBoss Enterprise Application Platform 7.0
Abstract
Chapter 1. Overview
The purpose of this guide is to cover many of the configuration tasks needed for setting up and maintaining JBoss EAP as well as running applications and other services on it. Before using this guide to configure JBoss EAP, it is assumed that the latest version of JBoss EAP has been downloaded and installed. For installation instructions, see the JBoss EAP Installation Guide.
Since the installation location of JBoss EAP will vary between host machines, this guide refers to the installation location as EAP_HOME
. The actual location of the JBoss EAP installation should be used instead of EAP_HOME
when performing administrative tasks.
Chapter 2. Starting and Stopping JBoss EAP
2.1. Starting JBoss EAP
JBoss EAP runs in one of two operating modes: as a standalone server or in a managed domain, and is supported on several platforms: Red Hat Enterprise Linux, Windows Server, Oracle Solaris, and Hewlett-Packard HP-UX.
The specific command to start JBoss EAP depends on the underlying platform and the desired operating mode.
Start JBoss EAP as a Standalone Server
$ EAP_HOME/bin/standalone.sh
For Windows Server, use the EAP_HOME\bin\standalone.bat
script.
This startup script uses the EAP_HOME/bin/standalone.conf
file (or standalone.conf.bat
for Windows Server) to set some default preferences, such as JVM options. You can customize the settings in this file.
JBoss EAP uses the standalone.xml
configuration file by default, but can be started using a different one. For details on the available standalone configuration files and how to use them, see the Standalone Server Configuration Files section.
For a complete listing of all available startup script arguments and their purposes, use the --help
argument or see the Server Runtime Arguments section.
Start JBoss EAP in a Managed Domain
The domain controller must be started before the servers in any of the server groups in the domain. Use this script to first start the domain controller, and then for each associated host controller.
$ EAP_HOME/bin/domain.sh
For Windows Server, use the EAP_HOME\bin\domain.bat
script.
This startup script uses the EAP_HOME/bin/domain.conf
file (or domain.conf.bat
for Windows Server) to set some default preferences, such as JVM options. You can customize the settings in this file.
JBoss EAP uses the host.xml
host configuration file by default, but can be started using a different one. For details on the available managed domain configuration files and how to use them, see the Managed Domain Configuration Files section.
When setting up a managed domain, additional arguments will need to be passed into the startup script. For a complete listing of all available startup script arguments and their purposes, use the --help
argument or see the Server Runtime Arguments section.
2.2. Stopping JBoss EAP
The way that you stop JBoss EAP depends on how it was started.
Stop an Interactive Instance of JBoss EAP
Press Ctrl+C
in the terminal where JBoss EAP was started.
Stop a Background Instance of JBoss EAP
Use the management CLI to connect to the running instance and shut down the server.
Launch the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect
Issue the
shutdown
command.shutdown
When running in a managed domain, you must specify the host name to shut down by using the --host
argument with the shutdown
command.
2.3. Running JBoss EAP in Admin-Only Mode
JBoss EAP has the ability to be started in admin-only mode. This enables JBoss EAP to run and accept management requests but not start other runtime services or accept end user requests. Admin-only mode is available in both standalone servers as well as managed domains. In a managed domain, if a domain controller is started in admin-only mode, it will not accept incoming connections from slave host controllers.
To start a JBoss EAP instance in admin-only mode, use the --admin-only
runtime switch when starting the JBoss EAP instance.
The management CLI commands shown assume that you are running a JBoss EAP standalone server. For more details on using the management CLI for a JBoss EAP managed domain, please see the JBoss EAP Management CLI Guide.
Start JBoss EAP in Admin-Only Mode
$ EAP_HOME/bin/standalone.sh --admin-only
Check If JBoss EAP is Running in Admin-Only Mode
To determine if a JBoss EAP instance is running in admin-only mode:
The management CLI commands shown assume that you are running a JBoss EAP standalone server. For more details on using the management CLI for a JBoss EAP managed domain, please see the JBoss EAP Management CLI Guide.
:read-attribute(name=running-mode)
If the JBoss EAP instance is running in admin-only mode, the result will be:
{ "outcome" => "success", "result" => "ADMIN_ONLY" }
otherwise, the result will be:
{ "outcome" => "success", "result" => "NORMAL" }
Restart in a Different Mode from the Management CLI
In addition to stopping and starting a JBoss EAP instance with a different runtime switch, the management CLI may also be used to reload the server and start it in a different mode. To reload a JBoss EAP instance to start in admin-only mode:
The management CLI commands shown assume that you are running a JBoss EAP standalone server. For more details on using the management CLI for a JBoss EAP managed domain, please see the JBoss EAP Management CLI Guide.
reload --admin-only=true
To reload a JBoss EAP instance to start in normal mode:
reload --admin-only=false
Separate from the current running mode, the initial running mode may also be checked with the following command: /core-service=server-environment:read-attribute(name=initial-running-mode)
. This command differs from :read-attribute(name=running-mode)
by displaying the running mode in which JBoss EAP was launched and NOT its current running mode.
2.4. Suspend and Shut Down JBoss EAP Gracefully
JBoss EAP can be suspended or shut down gracefully. This allows active requests to complete normally, without accepting any new requests. A timeout value specifies how long that the suspend or shut down operation will wait for active requests to complete. While the server is suspended, management requests are still processed.
Graceful shutdown is coordinated at a server-wide level, mostly focused on the entry points at which a request enters the server. The following subsystems support graceful shutdown:
- Undertow
-
The
undertow
subsystem will wait for all requests to finish. - mod_cluster
-
The
modcluster
subsystem will notify the load balancer that the server is suspending in thePRE_SUSPEND
phase. - EJB
-
The
ejb3
subsystem will wait for all remote EJB requests and MDB message deliveries to finish. Delivery to MDBs is stopped in thePRE_SUSPEND
phase. EJB timers are suspended, and missed timers will be activated when the server is resumed. - EE Concurrency
The server will wait for all active jobs to finish. All queued jobs will be skipped. Currently, since EE Concurrency does not have persistence, those queued jobs that were skipped will be lost.
While the server is in a suspended state, scheduled tasks will continue to execute at their scheduled times but will throw a
java.lang.IllegalStateException
. Once the server is resumed, scheduled tasks will continue to execute normally and in most cases, tasks will not need to be rescheduled.- Batch
- The server will stop all running jobs within the timeout period and defer all scheduled jobs.
Graceful shutdown currently will not reject inbound remote distributed transactions or new inbound JMS messages. EE batch jobs and EE concurrency tasks scheduled by inflight activity are currently allowed to proceed. However, EE concurrency tasks submitted that pass the timeout window currently error when executed.
Requests are tracked by the request-controller
subsystem. Without this subsystem, suspend and resume capabilities are limited and the server will not wait for requests to complete before suspending or shutting down. However, if you do not need this capability, the request-controller
subsystem can be removed for a small performance improvement.
2.4.1. Suspend Servers
JBoss EAP 7 introduced a suspend mode, which suspends server operations gracefully. This allows all active requests to complete normally, but will not accept any new requests. Once the server has been suspended, it can be shut down, returned back to a running state, or left in a suspended state to perform maintenance.
The management interfaces are not impacted by suspending the server.
The server can be suspended and resumed using the management console or the management CLI.
Check the Server Suspend State
The server suspend state can be viewed using the following management CLI commands. The resulting value will be one of RUNNING
, PRE_SUSPEND
, SUSPENDING
, or SUSPENDED
.
Check the suspend state for a standalone server.
:read-attribute(name=suspend-state)
Check the suspend state for a server in a managed domain.
/host=master/server=server-one:read-attribute(name=suspend-state)
Suspend
Use the following management CLI commands to suspend the server, specifying the timeout value, in seconds, for the server to wait for active requests to complete. The default is 0
, which will suspend immediately. A value of -1
will cause the server to wait indefinitely for all active requests to complete.
Each example waits up to 60 seconds for requests to complete before suspending.
Suspend a standalone server.
:suspend(timeout=60)
Suspend all servers in a managed domain.
:suspend-servers(timeout=60)
Suspend a single server in a managed domain.
/host=master/server-config=server-one:suspend(timeout=60)
Suspend all servers in a server group.
/server-group=main-server-group:suspend-servers(timeout=60)
Resume
The server can be returned back to a normal running state to accept new requests by using the resume
command at the appropriate level (server, server group, entire domain). For example:
:resume
2.4.2. Shut Down Servers Gracefully
A server will be shut down gracefully if an appropriate timeout value is specified when stopping the server. Once the command is issued, the server will be suspended and will wait up to the specified timeout for all requests to finish before shutting down.
Use the following management CLI commands to shut down the server gracefully. Specify the timeout value, in seconds, for the server to wait for active requests to complete. The default is 0
, which will shut down the server immediately. A value of -1
will cause the server to wait indefinitely for all active requests to complete before shutting down.
Each example waits up to 60 seconds for requests to complete before shutting down.
Shut down a standalone server gracefully.
:shutdown(timeout=60)
Stop all servers in a managed domain gracefully.
:stop-servers(timeout=60)
Stop a single server in a managed domain gracefully.
/host=master/server-config=server-one:stop(timeout=60)
Stop all servers in a server group gracefully.
/server-group=main-server-group:stop-servers(timeout=60)
2.5. Starting and Stopping JBoss EAP (RPM Installation)
Starting and stopping JBoss EAP is different for an RPM installation compared to a ZIP or installer installation.
2.5.1. Starting JBoss EAP (RPM Installation)
The command for starting an RPM installation of JBoss EAP depends on which operating mode you want to start (a standalone server or a managed domain), and which Red Hat Enterprise Linux version you are running.
Start JBoss EAP as a Standalone Server (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-standalone start
For Red Hat Enterprise Linux 7:
$ systemctl start eap7-standalone.service
This will start JBoss EAP using the standalone.xml
configuration file by default. You can start JBoss EAP with a different standalone server configuration file by setting a property in the RPM service configuration file. For more information, see the Configure RPM Service Properties section below.
Start JBoss EAP in a Managed Domain (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-domain start
For Red Hat Enterprise Linux 7:
$ systemctl start eap7-domain.service
This will start JBoss EAP using the host.xml
configuration file by default. You can start JBoss EAP with a different managed domain configuration file by setting a property in the RPM service configuration file. For more information, see the Configure RPM Service Properties section below.
Configure RPM Service Properties
This section shows you how to configure the RPM service properties and other startup options for your JBoss EAP installation. Note that it is recommended to back up your configuration files before making modifications.
For a listing of all available startup options for an RPM installation, see the RPM Service Configuration Properties section.
For Red Hat Enterprise Linux 7, RPM service configuration files are loaded using systemd
, so variable expressions are not expanded.
Specify the server configuration file.
When starting a standalone server, the
standalone.xml
file is used by default. When running in a managed domain, thehost.xml
file is used by default. You can start JBoss EAP with a different configuration file by setting theWILDFLY_SERVER_CONFIG
property in the appropriate RPM configuration file, for example,eap7-standalone.conf
.WILDFLY_SERVER_CONFIG=standalone-full.xml
Bind to a specific IP address.
By default, a JBoss EAP RPM installation binds to
0.0.0.0
. You can bind JBoss EAP to a specific IP address by setting theWILDFLY_BIND
property in the appropriate RPM configuration file, for example,eap7-standalone.conf
.WILDFLY_BIND=192.168.0.1
NoteIf you want to bind the management interfaces to a specific IP address, this can be configured in the JBoss EAP startup configuration file as shown in the next example.
Set JVM options or Java properties.
You can specify JVM options or Java properties to pass into the JBoss EAP startup script by editing the startup configuration file. This file is
EAP_HOME/bin/standalone.conf
for a standalone server orEAP_HOME/bin/domain.conf
for a managed domain. The below example configures the heap size and binds the JBoss EAP management interfaces to an IP address.JAVA_OPTS="$JAVA_OPTS -Xms2048m -Xmx2048m" JAVA_OPTS="$JAVA_OPTS -Djboss.bind.address.management=192.168.0.1"
NoteIf required, the JBoss EAP bind address must be configured using the
WILDFLY_BIND
property and not using thejboss.bind.address
standard property here.
If a property has the same name in both the RPM service configuration file (for example, /etc/sysconfig/eap7-standalone
) and in the JBoss EAP startup configuration file (for example, EAP_HOME/bin/standalone.conf
), the value that takes precedence is the one in the JBoss EAP startup configuration file. One such property is JAVA_HOME
.
2.5.2. Stopping JBoss EAP (RPM Installation)
The command for stopping an RPM installation of JBoss EAP depends on which operating mode that was started (a standalone server or a managed domain), and which Red Hat Enterprise Linux version you are running.
Stop JBoss EAP as a Standalone Server (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-standalone stop
For Red Hat Enterprise Linux 7:
$ systemctl stop eap7-standalone.service
Stop JBoss EAP in a Managed Domain (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-domain stop
For Red Hat Enterprise Linux 7:
$ systemctl stop eap7-domain.service
For a listing of all available startup options for an RPM installation, see the RPM Service Configuration Files section.
2.6. PowerShell Scripts (Windows Server)
This feature is provided as Technology Preview only. It is not supported for use in a production environment, and it may be subject to significant future changes. See Technology Preview Features Support Scope on the Red Hat Customer Portal for information about the support scope for Technology Preview features.
JBoss EAP includes PowerShell script equivalents for most of the JBoss EAP management scripts. This includes a PowerShell script to start JBoss EAP on Microsoft Windows Server.
The JBoss EAP PowerShell scripts are designed to work with PowerShell version 2 and newer running on tested versions of Windows Server.
The JBoss EAP PowerShell scripts are located in EAP_HOME\bin
, and are used in mostly the same way as the JBoss EAP batch scripts.
For example, to start a standalone JBoss EAP server with the standalone-full.xml
configuration file, use the following PowerShell command:
.\standalone.ps1 "-c=standalone-full.xml"
Arguments of the JBoss EAP PowerShell scripts must be in quotes.
Chapter 3. JBoss EAP Management
JBoss EAP uses a simplified configuration, with one configuration file per standalone server or managed domain. Default configuration for a standalone server is stored in the EAP_HOME/standalone/configuration/standalone.xml
file and default configuration for a managed domain is stored in the EAP_HOME/domain/configuration/domain.xml
file. Additionally, the default configuration for a host controller is stored in the EAP_HOME/domain/configuration/host.xml
file.
JBoss EAP can be configured using the command-line management CLI, web-based management console, Java API, or HTTP API. Changes made using these management interfaces persist automatically and the XML configuration files are overwritten by the Management API. The management CLI and management console are the preferred methods, and it is not recommended to edit the XML configuration files manually.
3.1. About Subsystems, Extensions, and Profiles
Different aspects of JBoss EAP functionality are configured in different subsystems. For example, application and server logging are configured in the logging
subsystem.
A subsystem provides configuration options for a particular extension. An extension is a module that extends the core functionality of the server. Extensions are loaded as they are needed by deployments, and are unloaded when they are no longer needed.
A collection of subsystem configurations makes up a profile, which is configured to satisfy the needs of the server. A standalone server has a single, unnamed profile. A managed domain can define many profiles for use by server groups in the domain.
For more information on the available subsystems, see Overview of JBoss EAP Subsystems.
Using the Management Console or the Management CLI
Both the management console and the management CLI are valid, supported ways of updating the configuration of a JBoss EAP instance. Deciding between the two is a matter of preference. Those who prefer to use a graphical, web-based interface should use the management console. Those who prefer a command-line interface should use the management CLI.
3.2. Management Users
The default JBoss EAP configuration provides local authentication so that a user can access the management CLI on the local host without requiring authentication.
However, you must add a management user if you want to access the management CLI remotely or use the management console, which is considered remote access even if the traffic originates on the local host. If you attempt to access the management console before adding a management user, you will receive an error message.
If JBoss EAP is installed using the graphical installer, then a management user is created during the installation process.
This guide covers simple user management for JBoss EAP using the add-user
script, which is a utility for adding new users to the properties files for out-of-the-box authentication. For more advanced authentication and authorization options, such as LDAP or Role-Based Access Control (RBAC), see the Core Management Authentication section of the JBoss EAP Security Architecture guide.
3.2.1. Adding a Management User
Run the
add-user
utility script and follow the prompts.$ EAP_HOME/bin/add-user.sh
NoteFor Windows Server, use the
EAP_HOME\bin\add-user.bat
script.Press
ENTER
to select the default optiona
to add a management user.This user will be added to the ManagementRealm and will be authorized to perform management operations using the management console or management CLI. The other choice (
b
) adds a user to the ApplicationRealm, which is used for applications and provides no particular permissions.Enter the desired username and password. You will be prompted to confirm the password.
By default, JBoss EAP allows weak passwords but will issue a warning. See Setting Add-User Utility Password Restrictions for details on changing this default behavior.
-
Enter a comma-separated list of groups to which the user belongs. If you do not want the user to belong to any groups, press
ENTER
to leave it blank. -
Review the information and enter
yes
to confirm. Determine whether this user represents a remote JBoss EAP server instance. For a basic management user, enter
no
.One type of user that may need to be added to the ManagementRealm is a user representing another instance of JBoss EAP, which must be able to authenticate to join as a member of a cluster. If this is the case, then answer
yes
to this prompt and you will be given a hashed secret value representing the user’s password, which will need to be added to a different configuration file.
Users can also be created non-interactively by passing parameters to the add-user
script. This approach is not recommended on shared systems, because the passwords will be visible in log and history files. For more information, see Running the Add-User Utility Non-Interactively.
3.2.2. Running the Add-User Utility Non-Interactively
You can run the add-user
script non-interactively by passing in arguments on the command line. At a minimum, the username and password must be provided.
This approach is not recommended on shared systems, because the passwords will be visible in log and history files.
Create a User Belonging to Multiple Groups
The following command adds a management user (mgmtuser1
) with the guest
and mgmtgroup
groups.
$ EAP_HOME/bin/add-user.sh -u 'mgmtuser1' -p 'password1!' -g 'guest,mgmtgroup'
Specify an Alternative Properties File
By default, user and group information created using the add-user
script are stored in properties files located in the server configuration directory.
User information is stored in the following properties files:
-
EAP_HOME/standalone/configuration/mgmt-users.properties
-
EAP_HOME/domain/configuration/mgmt-users.properties
Group information is stored in the following properties files:
-
EAP_HOME/standalone/configuration/mgmt-groups.properties
-
EAP_HOME/domain/configuration/mgmt-groups.properties
These default directories and properties file names can be overridden. The following command adds a new user, specifying a different name and location for the user properties files.
$ EAP_HOME/bin/add-user.sh -u 'mgmtuser2' -p 'password1!' -sc '/path/to/standaloneconfig/' -dc '/path/to/domainconfig/' -up 'newname.properties'
The new user was added to the user properties files now located at /path/to/standaloneconfig/newname.properties
and /path/to/domainconfig/newname.properties
. Note that these files must already exist or you will see an error.
For a complete listing of all available add-user
arguments and their purposes, use the --help
argument or see the Add-User Utility Arguments section.
3.2.3. Setting Add-User Utility Password Restrictions
The password restrictions for the add-user
utility script can be configured using the EAP_HOME/bin/add-user.properties
file.
By default, JBoss EAP allows weak passwords but will issue a warning. To reject passwords that do not meet the minimum requirements specified, set the password.restriction
property to REJECT
.
Additional password requirements that can be configured in the EAP_HOME/bin/add-user.properties
file:
- Minimum length
- Minimum alphabetic characters
- Minimum digits
- Minimum symbols
-
List of forbidden passwords (such as
admin
) - Whether to allow a password that matches the username
3.3. Management Interfaces
3.3.1. Management CLI
The management command-line interface (CLI) is a command-line administration tool for JBoss EAP.
Use the management CLI to start and stop servers, deploy and undeploy applications, configure system settings, and perform other administrative tasks. Operations can be performed in batch mode, allowing multiple tasks to be run as a group.
Many common terminal commands are available, such as ls
, cd
, and pwd
. The management CLI also supports tab completion.
For detailed information on using the management CLI, including commands and operations, syntax, and running in batch mode, see the JBoss EAP Management CLI Guide.
Launch the Management CLI
$ EAP_HOME/bin/jboss-cli.sh
For Windows Server, use the EAP_HOME\bin\jboss-cli.bat
script.
Connect to a Running Server
connect
Or you can launch the management CLI and connect in one step by using the EAP_HOME/bin/jboss-cli.sh --connect
command.
Display Help
Use the following command for general help.
help
Use the following command for help on a specific command.
deploy --help
Quit the Management CLI
quit
View System Settings
The following command uses the read-attribute
operation to display whether the example datasource is enabled.
/subsystem=datasources/data-source=ExampleDS:read-attribute(name=enabled) { "outcome" => "success", "result" => true }
When running in a managed domain, you must specify which profile to update by preceding the command with /profile=PROFILE_NAME
.
/profile=default/subsystem=datasources/data-source=ExampleDS:read-attribute(name=enabled)
Update System Settings
The following command uses the write-attribute
operation to disable the example datasource.
/subsystem=datasources/data-source=ExampleDS:write-attribute(name=enabled,value=false)
Start Servers
The management CLI can also be used to start and stop servers when running in a managed domain.
/host=HOST_NAME/server-config=server-one:start
3.3.2. Management Console
The management console is a web-based administration tool for JBoss EAP.
Use the management console to start and stop servers, deploy and undeploy applications, tune system settings, and make persistent modifications to the server configuration. The management console also has the ability to perform administrative tasks, with live notifications when any changes performed by the current user require the server instance to be restarted or reloaded.
In a managed domain, server instances and server groups in the same domain can be centrally managed from the management console of the domain controller.
For a JBoss EAP instance running on the local host using the default management port, the management console can be accessed through a web browser at http://localhost:9990/console/App.html. You will need to authenticate with a user that has permissions to access the management console.
The management console provides the following tabs for navigating and managing your JBoss EAP standalone server or managed domain.
- Home
- Learn how to accomplish several common configuration and management tasks. Take a tour to become familiar with the JBoss EAP management console.
- Deployments
- Add, remove, and enable deployments. In a managed domain, assign deployments to server groups.
- Configuration
- Configure available subsystems, which provide capabilities such as web services, messaging, or high availability. In a managed domain, manage the profiles that contain different subsystem configurations.
- Runtime
- View runtime information, such as server status, JVM usage, and server logs. In a managed domain, manage your hosts, server groups, and servers.
- Access Control
- Assign roles to users and groups when using Role-Based Access Control.
- Patching
- Apply patches to your JBoss EAP instances.
To take a tour of the updated management console, click the Take a Tour link on the management console home page.
To view details about the form fields, click the Need Help? link.
To view the message history of configuration actions you have performed, click the Messages link in the top-right of the management console.
3.3.2.1. Enable/Disable Management Console
You can enable or disable the management console by setting the console-enabled
boolean attribute of /core-service=management/management-interface=http-interface
resource. For master host in domain mode, /host=master/core-service=management/management-interface=http-interface
.
For example, to enable:
/core-service=management/management-interface=http-interface:write-attribute(name=console-enabled,value=true)
For example, to disable:
/core-service=management/management-interface=http-interface:write-attribute(name=console-enabled,value=false)
3.3.2.2. Change the Language of the Management Console
By default, the language settings of the management console is English. You can choose to use one of the following languages instead:
- German (de)
- Simplified Chinese (zh-Hans)
- Brazilian Portuguese (pt-BR)
- French (fr)
- Spanish (es)
- Japanese (ja)
To Change the Language of the Management Console
- Log in to the management console.
- Click the Settings link in the lower-right corner of the management console.
- Select the required language from the Locale selection box.
- Select Save. A confirmation box informs you that you need to reload the application.
- Click Confirm. The system refreshes your web browser automatically to use the selected locale.
3.4. Management APIs
3.4.1. HTTP API
The HTTP API endpoint is the entry point for management clients that rely on the HTTP protocol to integrate with the JBoss EAP management layer.
The HTTP API is used by the JBoss EAP management console but offers integration capabilities for other clients as well. By default, the HTTP API is accessible at http://HOST_NAME:9990/management
. This URL will display the raw attributes and values exposed to the API.
Read Resources
While you can read, write, or perform other operations using the HTTP POST
method, you can perform some read operations using a GET
request. The HTTP GET
method uses the following URL format.
http://HOST_NAME:9990/management/PATH_TO_RESOURCE?operation=OPERATION&PARAMETER=VALUE
Be sure to replace all of the replaceable values with those that are appropriate for your request. The following values are the available options for the OPERATION
replaceable value:
Value | Description |
---|---|
attribute |
Performs the |
operation-description |
Performs the |
operation-names |
Performs the |
resource |
Performs the |
resource-description |
Performs the |
snapshots |
Performs the |
The following example URLs show how to perform read operations using the HTTP API.
Example: Read All Attributes and Values for a Resource
http://HOST_NAME:9990/management/subsystem/undertow/server/default-server/http-listener/default
This displays all attributes and their values for the default
HTTP listener.
The default operation is read-resource
.
Example: Read the Value of an Attribute for a Resource
http://HOST_NAME:9990/management/subsystem/datasources/data-source/ExampleDS?operation=attribute&name=enabled
This reads the value of the enabled
attribute for the ExampleDS
datasource.
Update Resources
You can use the HTTP POST
method to update configuration values or perform other operations using the HTTP API. You must provide authentication for these operations.
The following examples show how to update resources using the HTTP API.
Example: Update the Value of an Attribute for a Resource
$ curl --digest http://HOST_NAME:9990/management --header "Content-Type: application/json" -u USERNAME:PASSWORD -d '{"operation":"write-attribute", "address":["subsystem","datasources","data-source","ExampleDS"], "name":"enabled", "value":"false", "json.pretty":"1"}'
This updates the value of the enabled
attribute for the ExampleDS
datasource to false
.
Example: Issue an Operation to the Server
$ curl --digest http://localhost:9990/management --header "Content-Type: application/json" -u USERNAME:PASSWORD -d '{"operation":"reload"}'
This reloads the server.
See Deploying Applications Using the HTTP API for information on how to deploy applications to JBoss EAP using the HTTP API.
3.4.2. Native API
The native API endpoint is the entry point for management clients that rely on the native protocol to integrate with the JBoss EAP management layer. The native API is used by the JBoss EAP management CLI but offers integration capabilities for other clients as well.
The following Java code shows an example of how to execute management operations from Java code using the native API.
You must add the required JBoss EAP libraries, found in the EAP_HOME/bin/client/jboss-cli-client.jar
file, to your class path.
Example: Using the Native API to Read Resources
// Create the management client ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990); // Create the operation request ModelNode op = new ModelNode(); // Set the operation op.get("operation").set("read-resource"); // Set the address ModelNode address = op.get("address"); address.add("subsystem", "undertow"); address.add("server", "default-server"); address.add("http-listener", "default"); // Execute the operation and manipulate the result ModelNode returnVal = client.execute(op); System.out.println("Outcome: " + returnVal.get("outcome").toString()); System.out.println("Result: " + returnVal.get("result").toString()); // Close the client client.close();
3.5. Configuration Data
3.5.1. Standalone Server Configuration Files
The standalone configuration files are located in the EAP_HOME/standalone/configuration/
directory. A separate file exists for each of the four predefined profiles (default, ha, full, full-ha).
Table 3.1. Standalone Configuration Files
Configuration File | Purpose |
---|---|
| This standalone configuration file is the default configuration that is used when you start your standalone server. It contains all information about the server, including subsystems, networking, deployments, socket bindings, and other configurable details. It does not provide the subsystems necessary for messaging or high availability. |
|
This standalone configuration file includes all of the default subsystems and adds the |
|
This standalone configuration file includes all of the default subsystems and adds the |
| This standalone configuration file includes support for every possible subsystem, including those for messaging and high availability. |
By default, starting JBoss EAP as a standalone server uses the standalone.xml
file. To start JBoss EAP with a different configuration, use the --server-config
argument. For example,
$ EAP_HOME/bin/standalone.sh --server-config=standalone-full.xml
3.5.2. Managed Domain Configuration Files
The managed domain configuration files are located in the EAP_HOME/domain/configuration/
directory.
Table 3.2. Managed Domain Configuration Files
Configuration File | Purpose |
---|---|
| This is the main configuration file for a managed domain. Only the domain master reads this file. This file contains the configurations for all of the profiles (default, ha, full, full-ha). |
|
This file includes configuration details specific to a physical host in a managed domain, such as network interfaces, socket bindings, the name of the host, and other host-specific details. The |
| This file includes only the configuration details necessary to run a server as the master domain controller. |
| This file includes only the configuration details necessary to run a server as a managed domain host controller. |
By default, starting JBoss EAP in a managed domain uses the host.xml
file. To start JBoss EAP with a different configuration, use the --host-config
argument. For example,
$ EAP_HOME/bin/domain.sh --host-config=host-master.xml
3.5.3. Backing Up Configuration Data
In order to later restore the JBoss EAP server configuration, items in the following locations should be backed up:
EAP_HOME/standalone/configuration/
- Back up the entire directory to save user data, server configuration, and logging settings for standalone servers.
EAP_HOME/domain/configuration/
- Back up the entire directory to save user and profile data, domain and host configuration, and logging settings for managed domains.
EAP_HOME/modules/
- Back up any custom modules.
EAP_HOME/welcome-content/
- Back up any custom welcome content.
EAP_HOME/bin/
- Back up any custom scripts or startup configuration files.
3.5.4. Configuration File Snapshots
To assist in the maintenance and management of the server, JBoss EAP creates a timestamped version of the original configuration file at the time of startup. Any additional configuration changes made by management operations will result in the original file being automatically backed up, and a working copy of the instance being preserved for reference and rollback. Additionally, configuration snapshots can be taken, which are point-in-time copies of the current server configuration. These snapshots can be saved and loaded by an administrator.
The following examples use the standalone.xml
file, but the same process applies to the domain.xml
and host.xml
files.
Take a Snapshot
Use the management CLI to take a snapshot of the current configurations.
:take-snapshot { "outcome" => "success", "result" => "EAP_HOME/standalone/configuration/standalone_xml_history/snapshot/20151022-133109702standalone.xml" }
List Snapshots
Use the management CLI to list all snapshots that have been taken.
:list-snapshots { "outcome" => "success", "result" => { "directory" => "EAP_HOME/standalone/configuration/standalone_xml_history/snapshot", "names" => [ "20151022-133109702standalone.xml", "20151022-132715958standalone.xml" ] } }
Delete a Snapshot
Use the management CLI to delete a snapshot.
:delete-snapshot(name=20151022-133109702standalone.xml)
Start the Server with a Snapshot
The server can be started using a snapshot or an automatically-saved version of the configuration.
-
Navigate to the
EAP_HOME/standalone/configuration/standalone_xml_history
directory and identify the snapshot or saved configuration file to be loaded. Start the server and point to the selected configuration file. Pass in the file path relative to the configuration directory,
EAP_HOME/standalone/configuration/
.$ EAP_HOME/bin/standalone.sh --server-config=standalone_xml_history/snapshot/20151022-133109702standalone.xml
When running in a managed domain, use the --host-config
argument instead to specify the configuration file.
3.5.5. View Configuration Changes
JBoss EAP 7 provides the ability to track configuration changes made to the running system. This allows administrators to view a history of configuration changes made by other authorized users.
Changes are stored in memory and are not persisted between server restarts. This feature is not a replacement for management audit logging.
To enable to tracking of configuration changes, use the following management CLI command. You can specify how many entries to store using the max-history
attribute.
/core-service=management/service=configuration-changes:add(max-history=10)
To view the list of most recent configuration changes, use the following management CLI command.
/core-service=management/service=configuration-changes:list-changes
This will list each configuration change made, with the date, origin, outcome, and operation details. For example, the below output from the list-changes
command shows configuration changes, with the most recent displayed first.
{ "outcome" => "success", "result" => [ { "operation-date" => "2016-02-12T18:37:00.354Z", "access-mechanism" => "NATIVE", "remote-address" => "127.0.0.1/127.0.0.1", "outcome" => "success", "operations" => [{ "address" => [], "operation" => "reload", "operation-headers" => { "caller-type" => "user", "access-mechanism" => "NATIVE" } }] }, { "operation-date" => "2016-02-12T18:34:16.859Z", "access-mechanism" => "NATIVE", "remote-address" => "127.0.0.1/127.0.0.1", "outcome" => "success", "operations" => [{ "address" => [ ("subsystem" => "datasources"), ("data-source" => "ExampleDS") ], "operation" => "write-attribute", "name" => "enabled", "value" => false, "operation-headers" => { "caller-type" => "user", "access-mechanism" => "NATIVE" } }] }, { "operation-date" => "2016-02-12T18:24:11.670Z", "access-mechanism" => "HTTP", "remote-address" => "127.0.0.1/127.0.0.1", "outcome" => "success", "operations" => [{ "operation" => "remove", "address" => [ ("subsystem" => "messaging-activemq"), ("server" => "default"), ("jms-queue" => "ExpiryQueue") ], "operation-headers" => {"access-mechanism" => "HTTP"} }] } ] }
This example lists the details of three operations performed that impacted the configuration:
- Reloading the server from the management CLI.
-
Disabling the
ExampleDS
datasource from the management CLI. -
Removing the
ExpiryQueue
queue from the management console.
3.5.6. Property Replacement
JBoss EAP allows you to use expressions to define replaceable properties in place of literal values in the configuration. Expressions use the format ${PARAMETER:DEFAULT_VALUE}
. If the specified parameter is set, then the parameter’s value will be used. Otherwise, the default value provided will be used.
The supported sources for resolving expressions are system properties, environment variables, and the vault. For deployments only, the source can be properties listed in a META-INF/jboss.properties
file in the deployment archive. For deployment types that support subdeployments, the resolution is scoped to all subdeployments if the properties file is in the outer deployment, for example the EAR. If the properties file is in the subdeployment, then the resolution is scoped just to that subdeployment.
The example below from the standalone.xml
configuration file sets the inet-address
for the public
interface to 127.0.0.1
unless the jboss.bind.address
parameter is set.
<interface name="public"> <inet-address value="${jboss.bind.address:127.0.0.1}"/> </interface>
The jboss.bind.address
parameter can be set when starting EAP as a standalone server with the following command:
$ EAP_HOME/bin/standalone.sh -Djboss.bind.address=IP_ADDRESS
Nested Expressions
Expressions can be nested, which allows for more advanced use of expressions in place of fixed values. The format of a nested expression is like that of a normal expression, but one expression is embedded in the other, for example:
${SYSTEM_VALUE_1${SYSTEM_VALUE_2}}
Nested expressions are evaluated recursively, so the inner expression is first evaluated, then the outer expression is evaluated. Expressions may also be recursive, where an expression resolves to another expression, which is then resolved. Nested expressions are permitted anywhere that expressions are permitted, with the exception of management CLI commands.
An example of where a nested expression might be used is if the password used in a datasource definition is masked. The configuration for the datasource might have the following line:
<password>${VAULT::ds_ExampleDS::password::1}</password>
The value of ds_ExampleDS
could be replaced with a system property (datasource_name
) using a nested expression. The configuration for the datasource could instead have the following line:
<password>${VAULT::${datasource_name}::password::1}</password>
JBoss EAP would first evaluate the expression ${datasource_name}
, then input this to the larger expression and evaluate the resulting expression. The advantage of this configuration is that the name of the datasource is abstracted from the fixed configuration.
Descriptor-Based Property Replacement
Application configuration, such as datasource connection parameters, typically varies between development, testing, and production environments. This variance is sometimes accommodated by build system scripts, as the Java EE specification does not contain a method to externalize these configurations. With JBoss EAP, you can use descriptor-based property replacement to manage configuration externally.
Descriptor-based property replacement substitutes properties based on descriptors, allowing you to remove assumptions about the environment from the application and the build chain. Environment-specific configurations can be specified in deployment descriptors rather than annotations or build system scripts. You can provide configuration in files or as parameters at the command line.
There are several flags in the ee
subsystem that control whether property replacement is applied.
JBoss-specific descriptor replacement is controlled by the jboss-descriptor-property-replacement
flag and is enabled by default. When enabled, properties can be replaced in the following deployment descriptors:
-
jboss-ejb3.xml
-
jboss-app.xml
-
jboss-web.xml
-
*-jms.xml
-
*-ds.xml
The following management CLI command can be used to enable or disable property replacement in JBoss-specific descriptors:
/subsystem=ee:write-attribute(name="jboss-descriptor-property-replacement",value=VALUE)
Java EE descriptor replacement controlled by the spec-descriptor-property-replacement
flag and is disabled by default. When enabled, properties can be replaced in the following deployment descriptors:
-
ejb-jar.xml
-
persistence.xml
-
application.xml
-
web.xml
The following management CLI command can be used to enable or disable property replacement in Java EE descriptors:
/subsystem=ee:write-attribute(name="spec-descriptor-property-replacement",value=VALUE)
3.6. File System Paths
JBoss EAP uses logical names for file system paths. Other areas of the configuration can then reference the paths using their logical name, avoiding the need to use absolute paths for each instance and allowing specific host configurations to resolve to universal logical names.
For example, the default logging
subsystem configuration declares jboss.server.log.dir
as the logical name for the server log directory.
Example: Relative Path Example for the Server Log Directory
<file relative-to="jboss.server.log.dir" path="server.log"/>
JBoss EAP automatically provides a number of standard paths without any need for the user to configure them in a configuration file.
Table 3.3. Standard Paths
Property | Description |
---|---|
java.ext.dirs | The Java development kit extension directory paths. |
java.home | The Java installation directory |
jboss.controller.temp.dir |
A common alias for standalone servers and managed domains. The directory to be used for temporary file storage. Equivalent to |
jboss.domain.base.dir | The base directory for domain content. |
jboss.domain.config.dir | The directory that contains the domain configuration. |
jboss.domain.data.dir | The directory that the domain will use for persistent data file storage. |
jboss.domain.log.dir | The directory that the domain will use for persistent log file storage. |
jboss.domain.temp.dir | The directory that the domain will use for temporary file storage. |
jboss.domain.deployment.dir | The directory that the domain will use for storing deployed content. |
jboss.domain.servers.dir | The directory that the domain will use for storing outputs of the managed domain instances. |
jboss.home.dir | The root directory of the JBoss EAP distribution. |
jboss.server.base.dir | The base directory for standalone server content. |
jboss.server.config.dir | The directory that contains the standalone server configuration. |
jboss.server.data.dir | The directory the standalone server will use for persistent data file storage. |
jboss.server.log.dir | The directory the standalone server will use for log file storage. |
jboss.server.temp.dir | The directory the standalone server will use for temporary file storage. |
jboss.server.deploy.dir | The directory that the standalone server will use for storing deployed content. |
user.dir | The user’s current working directory. |
user.home | The user home directory. |
You can override a standard path or add a custom path.
3.6.1. Override a Standard Path
You can override the default locations of the standard paths that begin with jboss.server.*
or jboss.domain.*
. This can be done in one of two ways:
Pass in the command-line argument when you start the server. For example:
$ EAP_HOME/bin/standalone.sh -Djboss.server.log.dir=/var/log
Modify the
JAVA_OPTS
variable in the server configuration file (standalone.conf
ordomain.conf
). For example:JAVA_OPTS="$JAVA_OPTS -Djboss.server.log.dir=/var/log"
Overriding a Managed Domain’s Standard Paths
In this example, the objective is to store domain files in the /opt/jboss_eap/domain_data
directory, and give each top-level directory a custom name. The default directory grouping, by-server
, is used.
-
Log files are to be stored in the
all_logs
subdirectory -
Data files are to be stored in the
all_data
subdirectory -
Temporary files are to be stored in the
all_temp
subdirectory -
Servers' files are to be stored in the
all_servers
subdirectory
To achieve this configuration, you would override several system properties when starting JBoss EAP.
$ EAP_HOME/bin/domain.sh -Djboss.domain.temp.dir=/opt/jboss_eap/domain_data/all_temp -Djboss.domain.log.dir=/opt/jboss_eap/domain_data/all_logs -Djboss.domain.data.dir=/opt/jboss_eap/domain_data/all_data -Djboss.domain.servers.dir=/opt/jboss_eap/domain_data/all_servers
The resulting path structure will be as follows:
/opt/jboss_eap/domain_data/ ├── all_data ├── all_logs ├── all_servers │ ├── server-one │ │ ├── data │ │ ├── log │ │ └── tmp │ └── server-two │ ├── data │ ├── log │ └── tmp └── all_temp
3.6.2. Add a Custom Path
You can add a custom file system path using the management CLI or the management console.
From the management CLI, you can add a new path using the following management CLI command.
/path=my.custom.path:add(path=/my/custom/path)
- From the management console, you can configure file system paths by navigating to the Configuration tab and selecting Paths. From there, you can add, modify, and remove paths.
You can then use this custom path in your configuration. For example, the below log handler uses a custom path for its relative path.
<subsystem xmlns="urn:jboss:domain:logging:3.0"> ... <periodic-rotating-file-handler name="FILE" autoflush="true"> <formatter> <named-formatter name="PATTERN"/> </formatter> <file relative-to="my.custom.path" path="server.log"/> <suffix value=".yyyy-MM-dd"/> <append value="true"/> </periodic-rotating-file-handler> ... </subsystem>
3.6.3. Directory Grouping
In a managed domain, each server’s files are stored in the EAP_HOME/domain
directory. You can specify how to organize the subdirectories for servers using the host controller’s directory-grouping
attribute. Directories can be grouped either by server or by type. By default, directories are grouped by server.
Directory Grouping by Server
By default, directories are grouped by server. If your administration is server-centric, this configuration is recommended. For example, it allows backups and log file handling to be configured per server instance.
If JBoss EAP is installed using the ZIP installation method, the default directory structure (grouped by server) will be as follows.
EAP_HOME/domain └─ servers ├── server-one │ ├── data │ ├── tmp │ └── log └── server-two ├── data ├── tmp └── log
To group domain directories by server, enter the following management CLI command:
/host=HOST_NAME:write-attribute(name=directory-grouping,value=by-server)
This will update the host controller’s host.xml
configuration file:
<servers directory-grouping="by-server"> <server name="server-one" group="main-server-group"/> <server name="server-two" group="main-server-group" auto-start="true"> <socket-bindings port-offset="150"/> </server> </servers>
Directory Grouping by Type
Instead of grouping directories by server, you can instead group by file type. If your administration is file type-centric, this configuration is recommended. For example, this would allow you to easily back up only data
files.
If JBoss EAP is installed using the ZIP installation method and the domain’s files are grouped by type, the directory structure will be as follows.
EAP_HOME/domain ├── data │ └── servers │ ├── server-one │ └── server-two ├── log │ └── servers │ ├── server-one │ └── server-two └── tmp └── servers ├── server-one └── server-two
To group domain directories by type, enter the following management CLI command:
/host=HOST_NAME:write-attribute(name=directory-grouping,value=by-type)
This will update the host controller’s host.xml
configuration file:
<servers directory-grouping="by-type"> <server name="server-one" group="main-server-group"/> <server name="server-two" group="main-server-group" auto-start="true"> <socket-bindings port-offset="150"/> </server> </servers>
3.7. System Properties
You can use Java system properties to configure many JBoss EAP options, as well as set any name-value pair for use within the application server.
System properties can be used to override default values in the JBoss EAP configuration. For example, the following XML configuration for the public interface bind address shows that it can be set by the jboss.bind.address
system property, but if the system property is not provided, it will default to 127.0.0.1
.
<inet-address value="${jboss.bind.address:127.0.0.1}"/>
There are a few ways you can set system properties in JBoss EAP, including:
If you use a JBoss EAP managed domain, system properties can be applied to either the whole domain, a specific server group, a specific host and all its server instances, or just to one specific server instance. As with most other JBoss EAP domain settings, a system property set at a more specific level will override a more abstract one. See the Domain Management chapter for more information.
Passing a System Property to the Startup Script
You can pass a system property to the JBoss EAP startup script by using the -D
argument. For example:
$ EAP_HOME/bin/standalone.sh -Djboss.bind.address=192.168.1.2
This method of setting the system property is especially useful for JBoss EAP options that need to be set before JBoss EAP starts.
Setting a System Property Using the Management CLI
Using the management CLI, you can set a system property using the following syntax:
/system-property=PROPERTY_NAME:add(value=PROPERTY_VALUE)
For example:
/system-property=jboss.bind.address:add(value=192.168.1.2)
When setting system properties using the management CLI, some JBoss EAP options, including the above example of jboss.bind.address
, will only take effect after the next server restart.
For a managed domain, the above example configures a system property for the entire domain, but you can also set or override system properties at more specific levels of the domain configuration.
Setting a System Property Using the Management Console
- For a standalone JBoss EAP server, you can configure system properties in the management console under the Configuration tab. Select System Properties, and click the View button.
For a managed domain:
- Domain-level system properties can be set in the Configuration tab. Select System Properties, and click the View button.
- Server group, and server-level system properties can be set in the Runtime tab. Select the server group or server you want to configure, click the View button next to the server group or server name, and select the System Properties tab.
- Host-level system properties can be set in the Runtime tab. Select the host you want to configure, then using the drop-down menu next to the host name, select Properties.
Setting a System Property Using JAVA_OPTS
System properties can also be configured using the JAVA_OPTS
environment variable. There are many ways to modify JAVA_OPTS
, but JBoss EAP provides a configuration file for setting JAVA_OPTS
that is used by the JBoss EAP process.
For a standalone server, this file is EAP_HOME/bin/standalone.conf
, or for a managed domain, it is EAP_HOME/bin/domain.conf
. For Microsoft Windows systems these files have a .bat
extension.
For an RPM installation, the RPM service configuration file is the preferred location to modify JAVA_OPTS
to configure system properties. For more information, see Configure RPM Service Properties.
Add your system property definition to JAVA_OPTS
in the relevant configuration file. The examples below demonstrate setting the bind address on a Red Hat Enterprise Linux system.
For
standalone.conf
, add yourJAVA_OPTS
system property definition at the end of the file. For example:... # Set the bind address JAVA_OPTS="$JAVA_OPTS -Djboss.bind.address=192.168.1.2"
For
domain.conf
,JAVA_OPTS
must be set before the process controllerJAVA_OPTS
setting. For example:... # Set the bind address JAVA_OPTS="$JAVA_OPTS -Djboss.bind.address=192.168.1.2" # The ProcessController process uses its own set of java options if [ "x$PROCESS_CONTROLLER_JAVA_OPTS" = "x" ]; then ...
3.8. Management Audit Logging
You can enable audit logging for the management interfaces, which will log all operations performed using the management console, management CLI, or custom application that uses the Management API. Audit log entries are stored in JSON format. By default, audit logging is disabled.
You can configure audit logging to output to a file or to a syslog server.
Login and logout events cannot be audited as there is no authenticated session in JBoss EAP. Instead, audit messages are logged when an operation is received from the user.
Standalone Server Audit Logging
Though disabled by default, the default audit logging configuration writes to a file.
<audit-log> <formatters> <json-formatter name="json-formatter"/> </formatters> <handlers> <file-handler name="file" formatter="json-formatter" path="audit-log.log" relative-to="jboss.server.data.dir"/> </handlers> <logger log-boot="true" log-read-only="false" enabled="false"> <handlers> <handler name="file"/> </handlers> </logger> </audit-log>
This configuration can be read using the following management CLI command.
/core-service=management/access=audit:read-resource(recursive=true)
See Enable Audit Logging to enable audit logging for a standalone server.
Managed Domain Audit Logging
Though disabled by default, the default audit logging configuration writes a file for each host and for each server.
<audit-log> <formatters> <json-formatter name="json-formatter"/> </formatters> <handlers> <file-handler name="host-file" formatter="json-formatter" relative-to="jboss.domain.data.dir" path="audit-log.log"/> <file-handler name="server-file" formatter="json-formatter" relative-to="jboss.server.data.dir" path="audit-log.log"/> </handlers> <logger log-boot="true" log-read-only="false" enabled="false"> <handlers> <handler name="host-file"/> </handlers> </logger> <server-logger log-boot="true" log-read-only="false" enabled="false"> <handlers> <handler name="server-file"/> </handlers> </server-logger> </audit-log>
This configuration can be read using the following management CLI command.
/host=HOST_NAME/core-service=management/access=audit:read-resource(recursive=true)
See Enable Audit Logging to enable audit logging for a managed domain.
3.8.1. Enable Management Audit Logging
JBoss EAP is preconfigured with file handlers for audit logging, though audit logging is disabled by default. The management CLI command to enable audit logging depends on whether you are running as a standalone server or in a managed domain. See Management Audit Logging Attributes for file handler attributes.
To set up syslog audit logging, see Set Up Management Audit Logging to a Syslog Server.
Enable Standalone Server Audit Logging
Audit logging can be enabled using the following command.
/core-service=management/access=audit/logger=audit-log:write-attribute(name=enabled,value=true)
By default, this will write the audit log to EAP_HOME/standalone/data/audit-log.log
.
Enable Managed Domain Audit Logging
The default audit logging configuration for a managed domain is preconfigured to write an audit log for each host and each server.
Audit logging for each host can be enabled using the following command.
/host=HOST_NAME/core-service=management/access=audit/logger=audit-log:write-attribute(name=enabled,value=true)
By default, this will write the audit logs to EAP_HOME/domain/data/audit-log.log
.
Audit logging for each server can be enabled using the following command.
/host=HOST_NAME/core-service=management/access=audit/server-logger=audit-log:write-attribute(name=enabled,value=true)
By default, this will write the audit logs to EAP_HOME/domain/servers/SERVER_NAME/data/audit-log.log
3.8.2. Send Management Audit Logging to a Syslog Server
A syslog handler specifies the parameters by which audit log entries are sent to a syslog server, specifically the syslog server’s host name and the port on which the syslog server is listening. Sending audit logging to a syslog server provides more security options than logging to a local file or local syslog server. Multiple syslog handlers can be defined and be active at the same time.
By default, audit logging is preconfigured to output to a file when enabled. Use the following steps to set up and enable audit logging to a syslog server. See Management Audit Logging Attributes for syslog handler attributes.
Add a syslog handler.
Create the syslog handler, specifying the host and port of the syslog server. In a managed domain, you must precede the
/core-service
commands with/host=HOST_NAME
.batch /core-service=management/access=audit/syslog-handler=SYSLOG_HANDLER_NAME:add(formatter=json-formatter) /core-service=management/access=audit/syslog-handler=SYSLOG_HANDLER_NAME/protocol=udp:add(host=HOST_NAME,port=PORT) run-batch
NoteThe parameters to pass in differ depending on the protocol specified.
To configure the handler to use TLS to communicate securely with the syslog server, you must also configure the authentication, for example:
/core-service=management/access=audit/syslog-handler=SYSLOG_HANDLER_NAME/protocol=tls/authentication=truststore:add(keystore-path=PATH_TO_TRUSTSTORE,keystore-password=TRUSTSTORE_PASSWORD)
Add a reference to the syslog handler.
In a managed domain, you must precede this command with
/host=HOST_NAME
./core-service=management/access=audit/logger=audit-log/handler=SYSLOG_HANDLER_NAME:add
Enable audit logging.
See Enable Management Audit Logging to enable audit logging.
Enabling audit logging to a syslog server in JBoss EAP will not work unless logging is enabled in the operating system as well.
For more information on rsyslog
configurations on Red Hat Enterprise Linux, see the Basic Configuration of Rsyslog section of the System Administrator’s Guide for Red Hat Enterprise Linux at https://access.redhat.com/documentation/en/red-hat-enterprise-linux/
3.8.3. Read Audit Log Entries
Audit log entries output to files are best viewed with a text viewer, while those output to a syslog server are best viewed using a syslog viewer application.
Using a text editor for viewing log files is not recommended as some may prevent further log entries being written to the log file.
The audit log entries are stored in JSON format. Each log entry begins with an optional timestamp, followed by the fields in the below table.
Table 3.4. Management Audit Log Fields
Field Name | Description |
---|---|
access | This can have one of the following values:
|
booting |
Has the value |
domainUUID | An ID to link together all operations as they are propagated from the domain controller to its servers, slave host controllers, and slave host controller servers. |
ops | The operations being executed. This is a list of the operations serialized to JSON. At boot, this is the operations resulting from parsing the XML. Once booted, the list typically contains a single entry. |
r/o |
Has the value |
remote-address | The address of the client executing this operation. |
success |
Has the value |
type |
This can have the value |
user |
The username of the authenticated user. If the operation occurred using the management CLI on the same machine as the running server, the special user |
version | The version number of the JBoss EAP instance. |
Chapter 4. Network and Port Configuration
4.1. Interfaces
JBoss EAP references named interfaces throughout the configuration. This allows the configuration to reference individual interface declarations with logical names, rather than requiring the full details of the interface at each use.
This also allows for easier configuration in a managed domain, where network interface details can vary across multiple machines. Each server instance can correspond to a logical name group.
The standalone.xml
, domain.xml
, and host.xml
files all include interface declarations. There are several preconfigured interface names, depending on which default configuration is used. The management
interface can be used for all components and services that require the management layer, including the HTTP management endpoint. The public
interface can be used for all application-related network communications. The unsecure
interface is used for IIOP sockets in the standard configuration. The private
interface is used for JGroups sockets in the standard configuration.
4.1.1. Default Interface Configurations
<interfaces> <interface name="management"> <inet-address value="${jboss.bind.address.management:127.0.0.1}"/> </interface> <interface name="public"> <inet-address value="${jboss.bind.address:127.0.0.1}"/> </interface> <interface name="private"> <inet-address value="${jboss.bind.address.private:127.0.0.1}"/> </interface> <interface name="unsecure"> <inet-address value="${jboss.bind.address.unsecure:127.0.0.1}"/> </interface> </interfaces>
By default, JBoss EAP binds these interfaces to 127.0.0.1
, but these values can be overridden at runtime by setting the appropriate property. For example, the inet-address
of the public
interface can be set when starting JBoss EAP as a standalone server with the following command.
$ EAP_HOME/bin/standalone.sh -Djboss.bind.address=IP_ADDRESS
Alternatively, you can use the -b
switch on the server start command line. For more information about server start options, see Server Runtime Arguments.
If you modify the default network interfaces or ports that JBoss EAP uses, you must also remember to change any scripts that use the modified interfaces or ports. These include JBoss EAP service scripts, as well as remembering to specify the correct interface and port when accessing the management console or management CLI.
4.1.2. Configuring Interfaces
Network interfaces are declared by specifying a logical name and selection criteria for the physical interface. The selection criteria can reference a wildcard address or specify a set of one or more characteristics that an interface or address must have in order to be a valid match. For a listing of all available interface selection criteria, see the Interface Attributes section.
Interfaces can be configured using the management console or the management CLI. Below are several examples of adding and updating interfaces. The management CLI command is shown first, followed by the corresponding configuration XML.
Add an Interface with a NIC Value
Add a new interface with a NIC value of eth0
.
/interface=external:add(nic=eth0)
<interface name="external"> <nic name="eth0"/> </interface>
Add an Interface with Several Conditional Values
Add a new interface that matches any interface/address on the correct subnet if it is up, supports multicast, and is not point-to-point.
/interface=default:add(subnet-match=192.168.0.0/16,up=true,multicast=true,not={point-to-point=true})
<interface name="default"> <subnet-match value="192.168.0.0/16"/> <up/> <multicast/> <not> <point-to-point/> </not> </interface>
Update an Interface Attribute
Update the public
interface’s default inet-address
value, keeping the jboss.bind.address
property to allow for this value to be set at runtime.
/interface=public:write-attribute(name=inet-address,value="${jboss.bind.address:192.168.0.0}")
<interface name="public"> <inet-address value="${jboss.bind.address:192.168.0.0}"/> </interface>
Add an Interface to a Server in a Managed Domain
/host=master/server-config=SERVER_NAME/interface=INTERFACE_NAME:add(inet-address=127.0.0.1)
<servers> <server name="SERVER_NAME" group="main-server-group"> <interfaces> <interface name="INTERFACE_NAME"> <inet-address value="127.0.0.1"/> </interface> </interfaces> </server> </servers>
4.2. Socket Bindings
Socket bindings and socket binding groups allow you to define network ports and their relationship to the networking interfaces required for your JBoss EAP configuration. A socket binding is a named configuration for a socket. A socket binding group is a collection of socket binding declarations that are grouped under a logical name.
This allows other sections of the configuration to reference socket bindings by their logical name, rather than requiring the full details of the socket configuration at each use.
The declarations for these named configurations can be found in the standalone.xml
and domain.xml
configuration files. A standalone server contains only one socket binding group, while a managed domain can contain multiple groups. You can create a socket binding group for each server group in the managed domain, or share a socket binding group between multiple server groups.
The ports used by JBoss EAP by default depend on which socket binding groups are used and the requirements of your individual deployments.
4.2.1. Management Ports
Management ports were consolidated in JBoss EAP 7. By default, JBoss EAP 7 uses port 9990
for both native management, used by the management CLI, and HTTP management, used by the web-based management console. Port 9999
, which was used as the native management port in JBoss EAP 6, is no longer used but can still be enabled if desired.
If HTTPS is enabled for the management console, then port 9993
is used by default.
4.2.2. Default Socket Bindings
JBoss EAP ships with a socket binding group for each of the four predefined profiles (default, ha, full, full-ha).
For detailed information about the default socket bindings, such as default ports and descriptions, see the Default Socket Bindings section.
If you modify the default network interfaces or ports that JBoss EAP uses, you must also remember to change any scripts that use the modified interfaces or ports. These include JBoss EAP service scripts, as well as remembering to specify the correct interface and port when accessing the management console or management CLI.
Standalone Server
When running as a standalone server, only one socket binding group is defined per configuration file. Each standalone configuration file (standalone.xml
, standalone-ha.xml
, standalone-full.xml
, standalone-full-ha.xml
) defines socket bindings for the technologies used by its corresponding profile.
For example, the default standalone configuration file (standalone.xml
) specifies the below socket bindings.
<socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}"> <socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/> <socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9993}"/> <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/> <socket-binding name="http" port="${jboss.http.port:8080}"/> <socket-binding name="https" port="${jboss.https.port:8443}"/> <socket-binding name="txn-recovery-environment" port="4712"/> <socket-binding name="txn-status-manager" port="4713"/> <outbound-socket-binding name="mail-smtp"> <remote-destination host="localhost" port="25"/> </outbound-socket-binding> </socket-binding-group>
Managed Domain
When running in a managed domain, all socket binding groups are defined in the domain.xml
file. There are four predefined socket binding groups:
-
standard-sockets
-
ha-sockets
-
full-sockets
-
full-ha-sockets
Each socket binding group specifies socket bindings for the technologies used by its corresponding profile. For example, the full-ha-sockets
socket binding group defines several jgroups
socket bindings, which are used by the full-ha profile for high availability.
<socket-binding-groups> <socket-binding-group name="standard-sockets" default-interface="public"> <!-- Needed for server groups using the 'default' profile --> <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/> <socket-binding name="http" port="${jboss.http.port:8080}"/> <socket-binding name="https" port="${jboss.https.port:8443}"/> <socket-binding name="txn-recovery-environment" port="4712"/> <socket-binding name="txn-status-manager" port="4713"/> <outbound-socket-binding name="mail-smtp"> <remote-destination host="localhost" port="25"/> </outbound-socket-binding> </socket-binding-group> <socket-binding-group name="ha-sockets" default-interface="public"> <!-- Needed for server groups using the 'ha' profile --> ... </socket-binding-group> <socket-binding-group name="full-sockets" default-interface="public"> <!-- Needed for server groups using the 'full' profile --> ... </socket-binding-group> <socket-binding-group name="full-ha-sockets" default-interface="public"> <!-- Needed for server groups using the 'full-ha' profile --> <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/> <socket-binding name="http" port="${jboss.http.port:8080}"/> <socket-binding name="https" port="${jboss.https.port:8443}"/> <socket-binding name="iiop" interface="unsecure" port="3528"/> <socket-binding name="iiop-ssl" interface="unsecure" port="3529"/> <socket-binding name="jgroups-mping" interface="private" port="0" multicast-address="${jboss.default.multicast.address:230.0.0.4}" multicast-port="45700"/> <socket-binding name="jgroups-tcp" interface="private" port="7600"/> <socket-binding name="jgroups-tcp-fd" interface="private" port="57600"/> <socket-binding name="jgroups-udp" interface="private" port="55200" multicast-address="${jboss.default.multicast.address:230.0.0.4}" multicast-port="45688"/> <socket-binding name="jgroups-udp-fd" interface="private" port="54200"/> <socket-binding name="modcluster" port="0" multicast-address="224.0.1.105" multicast-port="23364"/> <socket-binding name="txn-recovery-environment" port="4712"/> <socket-binding name="txn-status-manager" port="4713"/> <outbound-socket-binding name="mail-smtp"> <remote-destination host="localhost" port="25"/> </outbound-socket-binding> </socket-binding-group> </socket-binding-groups>
The socket configuration for the management interfaces is defined in the domain controller’s host.xml
file.
4.2.3. Configuring Socket Bindings
When defining a socket binding, you can configure the port
and interface
attributes, as well as multicast settings such as multicast-address
and multicast-port
. For details on all available socket bindings attributes, see the Socket Binding Attributes section.
Socket bindings can be configured using the management console or the management CLI. The following steps go through adding a socket binding group, adding a socket binding, and configuring socket binding settings using the management CLI.
Add a new socket binding group. Note that this step cannot be performed when running as a standalone server.
/socket-binding-group=new-sockets:add(default-interface=public)
Add a socket binding.
/socket-binding-group=new-sockets/socket-binding=new-socket-binding:add(port=1234)
Change the socket binding to use an interface other than the default, which is set by the socket binding group.
/socket-binding-group=new-sockets/socket-binding=new-socket-binding:write-attribute(name=interface,value=unsecure)
The following example shows how the XML configuration may look after the above steps have been completed.
<socket-binding-groups> ... <socket-binding-group name="new-sockets" default-interface="public"> <socket-binding name="new-socket-binding" interface="unsecure" port="1234"/> </socket-binding-group> </socket-binding-groups>
4.2.4. Port Offsets
A port offset is a numeric offset value added to all port values specified in the socket binding group for that server. This allows the server to inherit the port values defined in its socket binding group, with an offset to ensure that it does not conflict with any other servers on the same host. For instance, if the HTTP port of the socket binding group is 8080
, and a server uses a port offset of 100
, then its HTTP port is 8180
.
Below is an example of setting a port offset of 250
for a server in a managed domain using the management CLI.
/host=master/server-config=server-two/:write-attribute(name=socket-binding-port-offset,value=250)
Port offsets can be used for servers in a managed domain and for running multiple standalone servers on the same host.
You can pass in a port offset when starting a standalone server using the jboss.socket.binding.port-offset
property.
$ EAP_HOME/bin/standalone.sh -Djboss.socket.binding.port-offset=100
4.3. IPv6 Addresses
By default, JBoss EAP is configured to run using IPv4 addresses. The steps below show how to configure JBoss EAP to run using IPv6 addresses.
Configure the JVM Stack for IPv6 Addresses
Update the startup configuration to prefer IPv6 addresses.
Open the startup configuration file.
-
When running as a standalone server, edit the
EAP_HOME/bin/standalone.conf
file (orstandalone.conf.bat
for Windows Server). -
When running in a managed domain, edit the
EAP_HOME/bin/domain.conf
file (ordomain.conf.bat
for Windows Server).
-
When running as a standalone server, edit the
Set the
java.net.preferIPv4Stack
property tofalse
.-Djava.net.preferIPv4Stack=false
Append the
java.net.preferIPv6Addresses
property and set it totrue
.-Djava.net.preferIPv6Addresses=true
The following example shows how the JVM options in the startup configuration file may look after making the above changes.
# Specify options to pass to the Java VM. # if [ "x$JAVA_OPTS" = "x" ]; then JAVA_OPTS="-Xms1303m -Xmx1303m -Djava.net.preferIPv4Stack=false" JAVA_OPTS="$JAVA_OPTS -Djboss.modules.system.pkgs=$JBOSS_MODULES_SYSTEM_PKGS -Djava.awt.headless=true" JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv6Addresses=true" else
Update Interface Declarations for IPv6 Addresses
The default interface values in the configuration can be changed to IPv6 addresses. For example, the below management CLI command sets the management
interface to the IPv6 loopback address (::1
).
/interface=management:write-attribute(name=inet-address,value="${jboss.bind.address.management:[::1]}")
The following example shows how the XML configuration may look after running the above command.
<interfaces> <interface name="management"> <inet-address value="${jboss.bind.address.management:[::1]}"/> </interface> .... </interfaces>
Chapter 5. JBoss EAP Security
JBoss EAP offers the ability to configure security for its own interfaces and services as well as provide security for applications that are running on it.
- See the Security Architecture guide for an overview of general security concepts as well as JBoss EAP-specific security concepts.
- See How to Configure Server Security for information on securing JBoss EAP itself.
- See How to Configure Identity Management for information on providing security for applications deployed to JBoss EAP.
- See How to Set Up SSO with Kerberos for information on configuring single sign-on for JBoss EAP using Kerberos.
- See How To Set Up SSO with SAML v2 for information on configuring single sign-on for JBoss EAP using SAML v2.
Chapter 6. JBoss EAP Class Loading
JBoss EAP uses a modular class loading system for controlling the class paths of deployed applications. This system provides more flexibility and control than the traditional system of hierarchical class loaders. Developers have fine-grained control of the classes available to their applications, and can configure a deployment to ignore classes provided by the application server in favor of their own.
The modular class loader separates all Java classes into logical groups called modules. Each module can define dependencies on other modules in order to have the classes from that module added to its own class path. Because each deployed JAR and WAR file is treated as a module, developers can control the contents of their application’s class path by adding module configuration to their application.
6.1. Modules
A module is a logical grouping of classes used for class loading and dependency management. JBoss EAP identifies two different types of modules: static and dynamic. The main difference between the two is how they are packaged.
Static Modules
Static modules are defined in the EAP_HOME/modules/
directory of the application server. Each module exists as a subdirectory, for example EAP_HOME/modules/com/mysql/
. Each module directory then contains a slot subdirectory, which defaults to main
and contains the module.xml
configuration file and any required JAR files. All the application server-provided APIs are provided as static modules, including the Java EE APIs as well as other APIs.
Example MySQL JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.mysql"> <resources> <resource-root path="mysql-connector-java-5.1.36-bin.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
The module name (com.mysql
) must match the directory structure for the module, excluding the slot name (main
).
Creating custom static modules can be useful if many applications are deployed on the same server that use the same third-party libraries. Instead of bundling those libraries with each application, a module containing these libraries can be created and installed by an administrator. The applications can then declare an explicit dependency on the custom static modules.
The modules provided in JBoss EAP distributions are located in the system
directory within the EAP_HOME/modules
directory. This keeps them separate from any modules provided by third parties. Any Red Hat provided products that layer on top of JBoss EAP also install their modules within the system
directory.
Users must ensure that custom modules are installed into the EAP_HOME/modules
directory, using one directory per module. This ensures that custom versions of modules that already exist in the system
directory are loaded instead of the shipped versions. In this way, user-provided modules will take precedence over system modules.
If you use the JBOSS_MODULEPATH
environment variable to change the locations in which JBoss EAP searches for modules, then the product will look for a system
subdirectory structure within one of the locations specified. A system
structure must exist somewhere in the locations specified with JBOSS_MODULEPATH
.
Dynamic Modules
Dynamic modules are created and loaded by the application server for each JAR or WAR deployment (or subdeployment in an EAR). The name of a dynamic module is derived from the name of the deployed archive. Because deployments are loaded as modules, they can configure dependencies and be used as dependencies by other deployments.
Modules are only loaded when required. This usually only occurs when an application is deployed that has explicit or implicit dependencies.
6.2. Module Dependencies
A module dependency is a declaration that one module requires the classes of one or more other modules in order to function. When JBoss EAP loads a module, the modular class loader parses the dependencies of that module and adds the classes from each dependency to its class path. If a specified dependency cannot be found, the module will fail to load.
See the Modules section for complete details about modules and the modular class loading system.
Deployed applications (a JAR or WAR, for example) are loaded as dynamic modules and make use of dependencies to access the APIs provided by JBoss EAP.
There are two types of dependencies: explicit and implicit.
- Explicit Dependencies
-
Explicit dependencies are declared by the developer in a configuration file. A static module can declare dependencies in its
module.xml
file. A dynamic module can declare dependencies in the deployment’sMANIFEST.MF
orjboss-deployment-structure.xml
deployment descriptor. - Implicit Dependencies
Implicit dependencies are added automatically by JBoss EAP when certain conditions or meta-data are found in a deployment. The Java EE 7 APIs supplied with JBoss EAP are examples of modules that are added by detection of implicit dependencies in deployments.
Deployments can also be configured to exclude specific implicit dependencies by using the
jboss-deployment-structure.xml
deployment descriptor file. This can be useful when an application bundles a specific version of a library that JBoss EAP will attempt to add as an implicit dependency.
Optional Dependencies
Explicit dependencies can be specified as optional. Failure to load an optional dependency will not cause a module to fail to load. However, if the dependency becomes available later it will not be added to the module’s class path. Dependencies must be available when the module is loaded.
Export a Dependency
A module’s class path contains only its own classes and that of its immediate dependencies. A module is not able to access the classes of the dependencies of one of its dependencies. However, a module can specify that an explicit dependency is exported. An exported dependency is provided to any module that depends on the module that exports it.
For example, Module A depends on Module B, and Module B depends on Module C. Module A can access the classes of Module B, and Module B can access the classes of Module C. Module A cannot access the classes of Module C unless:
- Module A declares an explicit dependency on Module C, or
- Module B exports its dependency on Module C.
Global Modules
A global module is a module that JBoss EAP provides as a dependency to every application. Any module can be made global by adding it to JBoss EAP’s list of global modules. It does not require changes to the module.
See the Define Global Modules section for details.
6.3. Create a Custom Module
Custom static modules can be added to make resources available for deployments running on JBoss EAP. You can create the module manually or by using the management CLI.
Once you create the module, you must add the module as a dependency if its resources need to be made available to applications.
Create a Custom Module Manually
You can create a custom module manually using the following steps.
Create the appropriate directory structure in the
EAP_HOME/modules/
directory.Example: Create MySQL JDBC Driver Directory Structure
$ cd EAP_HOME/modules/ $ mkdir -p com/mysql/main
Copy the JAR files or other necessary resources to the
main/
subdirectory.Example: Copy MySQL JDBC Driver JAR
$ cp /path/to/mysql-connector-java-5.1.36-bin.jar EAP_HOME/modules/com/mysql/main/
Create a
module.xml
file in themain/
subdirectory, specifying the appropriate resources and dependencies in the file.Example: MySQL JDBC Driver
module.xml
File<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.mysql"> <resources> <resource-root path="mysql-connector-java-5.1.36-bin.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Create a Custom Module Using the Management CLI
You can create a custom module using the module add
management CLI command.
Using the module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.
- Start the JBoss EAP server.
Launch the management CLI, but do not use the
--connect
or-c
argument to connect to the running instance.$ EAP_HOME/bin/jboss-cli.sh
Use the
module add
management CLI command to add the new core module.module add --name=MODULE_NAME --resources=PATH_TO_RESOURCE --dependencies=DEPENDENCIES
Execute module --help
for more details on using this command to add and remove modules.
Add the Module as a Dependency
In order for your application to be able to access this module’s resources, you will need to add the module as a dependency.
- See the Add an Explicit Module Dependency to a Deployment section of the JBoss EAP Development Guide for adding application-specific dependencies using deployment descriptors.
- See the Define Global Modules section for instructions on adding modules as dependencies to all applications.
As an example, the following steps add a JAR file containing several properties files as a module and define a global module, so that an application can then load these properties.
Add the JAR file as a core module.
module add --name=myprops --resources=/path/to/properties.jar
Define this module as a global module so that it is made available to all deployments.
/subsystem=ee:list-add(name=global-modules,value={name=myprops})
The application could then retrieve the properties from one of the properties files contained within the JAR.
Thread.currentThread().getContextClassLoader().getResource("my.properties");
6.4. Remove a Custom Module
Custom static modules can be removed manually or by using the management CLI.
Remove a Custom Module Manually
Before manually removing a module, ensure that it is not required by deployed applications or elsewhere in the server configuration, such as by a datasource.
To remove a custom module, remove the module’s directory under EAP_HOME/modules/
, which includes its module.xml
file and associated JAR files or other resources. For example, remove the EAP_HOME/modules/com/mysql/main/
directory to remove a custom MySQL JDBC driver module in the main
slot.
Remove a Custom Module Using the Management CLI
You can remove a custom module using the module remove
management CLI command.
Using the module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.
- Start the JBoss EAP server.
Launch the management CLI, but do not use the
--connect
or-c
argument to connect to the running instance.$ EAP_HOME/bin/jboss-cli.sh
Use the
module remove
management CLI command to remove the custom module.module remove --name=MODULE_NAME
-
Use the
--slot
argument if the module to remove is in a slot other thanmain
.
Example: Remove a MySQL Module
module remove --name=com.mysql
-
Use the
Execute module --help
for more details on using this command to add and remove modules.
6.5. Define Global Modules
A list of global modules can be defined for JBoss EAP, which will add the modules as dependencies to all deployments.
You must know the name of the modules that are to be configured as global modules. For the complete listing of the included modules and whether they are supported, see Red Hat JBoss Enterprise Application Platform 7 Included Modules on the Red Hat Customer Portal. See the Dynamic Module Naming section for naming conventions for modules in deployments.
Use the following management CLI command to define the list of global modules.
/subsystem=ee:write-attribute(name=global-modules,value=[{name=MODULE_NAME_1},{name=MODULE_NAME_2}]
Use the following management CLI command to add a single module the list of existing global modules.
/subsystem=ee:list-add(name=global-modules,value={name=MODULE_NAME})
Global modules can also be added and removed using the management console by navigating to the EE subsystem from the Configuration tab and selecting the Global Modules section.
6.6. Configure Subdeployment Isolation
Each subdeployment in an Enterprise Archive (EAR) is a dynamic module with its own class loader. Subdeployments always have an implicit dependency on the parent module, which gives them access to classes in EAR/lib
. By default, a subdeployment can access the resources of other subdeployments within that EAR.
If you do not want a subdeployment to be allowed to access classes belonging to other subdeployments, then strict subdeployment isolation can be enabled in JBoss EAP. This setting will affect all deployments.
Enable Subdeployment Module Isolation for All Deployments
Subdeployment isolation can be enabled or disabled using the management console or the management CLI from the ee
subsystem. By default, subdeployment isolation is set to false, which allows the subdeployments to access resources of other subdeployments within an EAR deployment.
Use the following management CLI to enable EAR subdeployment isolation.
/subsystem=ee:write-attribute(name=ear-subdeployments-isolated,value=true)
Subdeployments in an EAR will no longer be able to access resources from other subdeployments.
6.7. Define an External JBoss EAP Module Directory
The default directory for JBoss EAP modules is EAP_HOME/modules
. You can specify a different directory for JBoss EAP modules using the JBOSS_MODULEPATH
variable. Follow the below steps to set this variable in the JBoss EAP startup configuration file.
You can also set JBOSS_MODULEPATH
as an environment variable instead of setting this in the JBoss EAP startup configuration files.
Edit the startup configuration file.
-
When running as a standalone server, edit the
EAP_HOME/bin/standalone.conf
file (orstandalone.conf.bat
for Windows Server). -
When running in a managed domain, edit the
EAP_HOME/bin/domain.conf
file (ordomain.conf.bat
for Windows Server).
-
When running as a standalone server, edit the
Set the
JBOSS_MODULEPATH
variable, for example:JBOSS_MODULEPATH="/path/to/modules/directory/"
To specify a list of directories use a colon (
:
) to delimit the list of directories.NoteFor Windows Server, use the following syntax to set the
JBOSS_MODULEPATH
variable:set "JBOSS_MODULEPATH /path/to/modules/directory/"
To specify a list of directories use a semicolon (
;
) to delimit the list of directories.
6.8. Dynamic Module Naming Conventions
JBoss EAP loads all deployments as modules, which are named according to the following conventions.
Deployments of WAR and JAR files are named using the following format:
deployment.DEPLOYMENT_NAME
For example,
inventory.war
andstore.jar
will have the module names ofdeployment.inventory.war
anddeployment.store.jar
respectively.Subdeployments within an Enterprise Archive (EAR) are named using the following format:
deployment.EAR_NAME.SUBDEPLOYMENT_NAME
For example, the subdeployment of
reports.war
within the enterprise archiveaccounts.ear
will have the module name ofdeployment.accounts.ear.reports.war
.
Chapter 7. Deploying Applications
JBoss EAP features a range of application deployment and configuration options to cater to both administrators and developers. For administrators, the management console and the management CLI offer ideal graphical and command-line interfaces to manage application deployment in a production environment. For developers, the range of application deployment testing options include a configurable file system deployment scanner, the HTTP API, an IDE such as Red Hat JBoss Developer Studio, and Maven.
When deploying applications, you may want to enable validation for deployment descriptors by setting the org.jboss.metadata.parser.validate
system property to true
. This can be done one of the following ways:
While starting the server.
$ EAP_HOME/bin/standalone.sh -Dorg.jboss.metadata.parser.validate=true
By adding it to the server configuration with the following management CLI command.
/system-property=org.jboss.metadata.parser.validate:add(value=true)
7.1. Deploying Applications Using the Management CLI
Deploying applications using the management CLI gives you the benefit of single command-line interface with the ability to create and run deployment scripts. You can use this scripting ability to configure specific application deployment and management scenarios. You can manage the deployments for a single server when running as a standalone server, or an entire network of servers when running in a managed domain.
7.1.1. Deploy an Application to a Standalone Server Using the Management CLI
Deploy an Application
From the management CLI, use the deploy
command and specify the path to the application deployment.
deploy /path/to/test-application.war
A successful deployment does not produce any output to the management CLI, but the server log displays deployment messages.
WFLYSRV0027: Starting deployment of "test-application.war" (runtime-name: "test-application.war") WFLYUT0021: Registered web context: /test-application WFLYSRV0010: Deployed "test-application.war" (runtime-name : "test-application.war")
The application has been successfully deployed.
Undeploy an Application
From the management CLI, use the undeploy
command and specify the deployment name.
Undeploy the application and delete the deployment content.
undeploy test-application.war
Undeploy the application without removing the deployment content from the repository.
undeploy test-application.war --keep-content
This is the same as disabling the deployment from the management console.
A successful undeployment does not produce any output to the management CLI, but the server log displays undeployment messages.
WFLYUT0022: Unregistered web context: /test-application WFLYSRV0028: Stopped deployment test-application.war (runtime-name: test-application.war) in 62ms WFLYSRV0009: Undeployed "test-application.war" (runtime-name: "test-application.war")
The application has been successfully undeployed.
List Deployments
From the management CLI, use the deployment-info
command to list deployment information.
deployment-info
The output will show details about each deployment, such as the runtime name, status, and whether it is enabled.
NAME RUNTIME-NAME PERSISTENT ENABLED STATUS jboss-helloworld.war jboss-helloworld.war true true OK test-application.war test-application.war true true OK
You can also filter the deployments to display by name using the --name
argument.
7.1.2. Deploy an Application in a Managed Domain Using the Management CLI
Deploy an Application
From the management CLI, use the deploy
command and specify the path to the application deployment. You must also specify the server groups to which the application should be deployed.
To deploy the application to all server groups.
deploy /path/to/test-application.war --all-server-groups
To deploy the application to specific server groups.
deploy /path/to/test-application.war --server-groups=main-server-group,other-server-group
A successful deployment does not produce any output to the management CLI, but the server log displays deployment messages for each affected server.
[Server:server-one] WFLYSRV0027: Starting deployment of "test-application.war" (runtime-name: "test-application.war") [Server:server-one] WFLYUT0021: Registered web context: /test-application [Server:server-one] WFLYSRV0010: Deployed "test-application.war" (runtime-name : "test-application.war")
The application has been successfully deployed to the appropriate server groups in your managed domain.
Undeploy an Application
From the management CLI, use the undeploy
command and specify the deployment name. You must also specify the server groups from which the application should be undeployed.
Undeploy the application from all server groups with that deployment.
undeploy test-application.war --all-relevant-server-groups
Undeploy the application from specific server groups. Note that the
--keep-content
parameter is required, as the content must remain in the repository for other server groups with that deployment.undeploy test-application.war --server-groups=other-server-group --keep-content
This is the same as disabling the deployment from the management console.
A successful undeployment does not produce any output to the management CLI, but the server log displays undeployment messages for each affected server.
[Server:server-one] WFLYUT0022: Unregistered web context: /test-application [Server:server-one] WFLYSRV0028: Stopped deployment test-application.war (runtime-name: test-application.war) in 74ms [Server:server-one] WFLYSRV0009: Undeployed "test-application.war" (runtime-name: "test-application.war")
The application has been successfully undeployed.
List Deployments
From the management CLI, use the deployment-info
command to list deployment information. You can list deployment information by deployment name or by server group.
To display deployment information by name:
deployment-info --name=jboss-helloworld.war
The output will list the deployment and its state in each server group.
NAME RUNTIME-NAME jboss-helloworld.war jboss-helloworld.war SERVER-GROUP STATE main-server-group enabled other-server-group added
To display deployment information by server group:
deployment-info --server-group=other-server-group
The output will list the deployments and their state for the specified server group.
NAME RUNTIME-NAME STATE jboss-helloworld.war jboss-helloworld.war added test-application.war test-application.war enabled
You can also list all deployments in the domain using the deploy -l
command.
7.2. Deploying Applications Using the Management Console
Deploying applications using the management console gives you the benefit of a graphical interface that is easy to use. You can see at a glance which applications are deployed to your server or server groups, and you can enable, disable or remove applications from the content repository as required.
7.2.1. Deploy an Application to a Standalone Server Using the Management Console
Deployments can be viewed and managed from the Deployments tab of the JBoss EAP management console.
Deploy an Application
Click the Add button and use the New Deployment wizard to deploy an application. You can choose to deploy an application by uploading a deployment or creating an unmanaged deployment. Deployments are enabled by default.
Upload a deployment
Upload an application that will be copied to the server’s content repository and managed by JBoss EAP.
Create an unmanaged deployment
Specify the location of a deployment. This deployment will not be copied to the server’s content repository and will not be managed by JBoss EAP. Note that exploded deployments are only supported as unmanaged.
Undeploy an Application
Select the deployment and choose the Remove option to undeploy the application. This undeploys the deployment and removes it from the content repository.
Disable an Application
Select the deployment and choose the Disable option to disable the application. This undeploys the deployment, but does not remove it from the content repository.
Replace an Application
Select the deployment and choose the Replace option. Select the new version of the deployment, which must have the same name as the original, and click Finish. This undeploys and removes the original version of the deployment, and then deploys the new version.
7.2.2. Deploy an Application in a Managed Domain Using the Management Console
From the Deployments tab of the JBoss EAP management console, deployments can be viewed and managed by:
Content Repository
All managed and unmanaged deployments are listed in the Content Repository section. Deployments can be added and assigned to server groups here.
Unassigned Content
Deployments that have not been assigned to any server groups are listed in the Unassigned Content section. Deployments can be assigned to server groups or removed here.
Server Groups
Deployments that have been assigned to one or more server groups are listed in the Server Groups section. Deployments can be enabled and added directly to a server group here.
Deploy an Application
- From Content Repository, click the Add button.
- Choose to deploy an application by uploading a deployment or creating an unmanaged deployment.
Follow the prompts to deploy the application.
Note that a deployment must be assigned to a server group before it can be enabled.
Deployments can also be added, assigned to a server group, and enabled in one step by adding the deployment from Server Groups.
Assign an Application to a Server Group
- From Unassigned Content, select a deployment and click the Assign button.
- Select one or more server groups to which this deployment should be assigned.
- Optionally, select the option to enable the deployment on the selected server groups.
Unassign an Application from a Server Group
- From Server Groups, select the appropriate server group.
- Select the desired deployment and click the Unassign button.
Deployments can also be unassigned from multiple server groups at once by selecting the Unassign button for the deployment in Content Repository.
Undeploy an Application
- If the deployment is still assigned to any server groups, be sure to unassign the deployment.
- From Content Repository, select the deployment and click the Remove button.
This undeploys the deployment and removes it from the content repository.
Disable an Application
- From Server Groups, select the appropriate server group.
- Select the desired deployment and click the Disable button.
This undeploys the deployment, but does not remove it from the content repository.
Replace an Application
- From Content Repository, select the deployment and click the Replace button.
- Select the new version of the deployment, which must have the same name as the original, and click Finish.
This undeploys and removes the original version of the deployment, and then deploys the new version.
7.3. Deploying Applications Using the Deployment Scanner
The deployment scanner monitors the deployment directory for applications to deploy. By default, the deployment scanner scans the EAP_HOME/standalone/deployments/
directory every five seconds for changes. Marker files are used to indicate the status of a deployment and to trigger actions against deployments, such as undeploying or redeploying.
While it is recommended to use the management console or management CLI for application deployment in a production environment, deploying using the deployment scanner is provided for the convenience of developers. This allows users build and test applications in a manner suited for rapid development cycles. Additionally, the deployment scanner should not be used in conjunction with other deployment methods.
The deployment scanner is only available when running JBoss EAP as a standalone server.
7.3.1. Deploy an Application to a Standalone Server Using the Deployment Scanner
The deployment scanner can be configured to allow or disallow automatic deployment of XML, zipped, and exploded content. If automatic deployment is disabled, you must manually create marker files to trigger deployment actions. For more information about the available marker file types and their purposes, see the Deployment Scanner Marker Files section.
By default, automatic deployment for XML and zipped content is enabled. For details on configuring automatic deployment for each content type, see Configure the Deployment Scanner.
Deploying using the deployment scanner is provided for the convenience of developers and is not recommended for use in a production environment. It should also not be used in conjunction with other deployment methods.
Deploy an Application
Copy the content to the deployment folder.
$ cp /path/to/test-application.war EAP_HOME/standalone/deployments/
If auto-deployment is enabled, this file will be picked up automatically, deployed, and a .deployed
marker file will be created. If auto-deployment is not enabled, then you will need to manually add a .dodeploy
marker file to trigger deployment.
$ touch EAP_HOME/standalone/deployments/test-application.war.dodeploy
Undeploy an Application
Trigger an undeployment by removing the .deployed
marker file.
$ rm EAP_HOME/standalone/deployments/test-application.war.deployed
If auto-deployment is enabled, you can also remove the test-application.war
file, which will trigger the undeployment. Note that this does not apply for exploded deployments.
Redeploy an Application
Create a .dodeploy
marker file to initiate redeployment.
$ touch EAP_HOME/standalone/deployments/test-application.war.dodeploy
7.3.2. Configure the Deployment Scanner
The deployment scanner can be configured using the management console or the management CLI. You can configure the deployment scanner’s behavior, such as the scan interval, deployment folder location, and autodeployment of certain application file types. You can also disable the deployment scanner entirely.
For details on all available deployment scanner attributes, see the Deployment Scanner Attributes section.
Use the below management CLI commands to configure the default deployment scanner.
Disable the Deployment Scanner
/subsystem=deployment-scanner/scanner=default:write-attribute(name=scan-enabled,value=false)
This disables the default
deployment scanner.
Change the Scan Interval
/subsystem=deployment-scanner/scanner=default:write-attribute(name=scan-interval,value=10000)
This updates the scan interval time from 5000
milliseconds (five seconds) to 10000
milliseconds (ten seconds).
Change the Deployment Folder
/subsystem=deployment-scanner/scanner=default:write-attribute(name=path,value=/path/to/deployments)
This changes the location of the deployment folder from the default location of EAP_HOME/standalone/deployments
to /path/to/deployments
.
The path
value will be treated as an absolute path unless the relative-to
attribute is specified, in which case it will be relative to that path.
Enable the Automatic Deployment of Exploded Content
/subsystem=deployment-scanner/scanner=default:write-attribute(name=auto-deploy-exploded,value=true)
This enables the automatic deployment of exploded content, which is disabled by default.
Disable the Automatic Deployment of Zipped Content
/subsystem=deployment-scanner/scanner=default:write-attribute(name=auto-deploy-zipped,value=false)
This disables the automatic deployment of zipped content, which is enabled by default.
Disable the Automatic Deployment of XML Content
/subsystem=deployment-scanner/scanner=default:write-attribute(name=auto-deploy-xml,value=false)
This disables the automatic deployment of XML content, which is enabled by default.
7.3.3. Define a Custom Deployment Scanner
A new deployment scanner can be added using the management CLI or by navigating to the Deployment Scanners subsystem from the Configuration tab in the management console. This will define a new directory to scan for deployments. The default deployment scanner monitors EAP_HOME/standalone/deployments
. See Configure the Deployment Scanner for details on configuring an existing deployment scanner.
The following management CLI command adds a new deployment scanner that will check EAP_HOME/standalone/new_deployment_dir
every five seconds for deployments.
/subsystem=deployment-scanner/scanner=new-scanner:add(path=new_deployment_dir,relative-to=jboss.server.base.dir,scan-interval=5000)
The specified directory must already exist or this command will fail with an error.
A new deployment scanner has been defined and the specified directory will be monitored for deployments.
7.4. Deploying Applications Using Maven
Deploying applications using Apache Maven allows you to easily incorporate deployment to JBoss EAP into your existing development workflow.
You can use Maven to deploy applications to JBoss EAP using the WildFly Maven Plugin, which provides simple operations to deploy and undeploy applications to the application server.
7.4.1. Deploy an Application to a Standalone Server Using Maven
The following instructions show how to deploy and undeploy the JBoss EAP helloworld
quickstart to a standalone server using Maven.
See Using the Quickstart Examples in the JBoss EAP Getting Started Guide for more information on the JBoss EAP quickstarts.
Deploy an Application
Initialize the WildFly Maven Plugin in your Maven pom.xml
file. This should already be configured in the JBoss EAP quickstart pom.xml
files.
<plugin> <groupId>org.wildfly.plugins</groupId> <artifactId>wildfly-maven-plugin</artifactId> <version>${version.wildfly.maven.plugin}</version> </plugin>
From the helloworld
quickstart directory, execute the following Maven command.
$ mvn clean install wildfly:deploy
After issuing the Maven command to deploy, the terminal window shows the following output indicating a successful deployment.
[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.981 s [INFO] Finished at: 2015-12-23T15:06:13-05:00 [INFO] Final Memory: 21M/231M [INFO] ------------------------------------------------------------------------
The deployment can also be confirmed by viewing the server log of the active server instance.
WFLYSRV0027: Starting deployment of "jboss-helloworld.war" (runtime-name: "jboss-helloworld.war") WFLYUT0021: Registered web context: /jboss-helloworld WFLYSRV0010: Deployed "jboss-helloworld.war" (runtime-name : "jboss-helloworld.war")
Undeploy an Application
From the helloworld
quickstart directory, execute the following Maven command.
$ mvn wildfly:undeploy
After issuing the Maven command to undeploy, the terminal window shows the following output indicating a successful undeployment.
[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.237 s [INFO] Finished at: 2015-12-23T15:09:10-05:00 [INFO] Final Memory: 10M/183M [INFO] ------------------------------------------------------------------------
The undeployment can also be confirmed by viewing the server log of the active server instance.
WFLYUT0022: Unregistered web context: /jboss-helloworld WFLYSRV0028: Stopped deployment jboss-helloworld.war (runtime-name: jboss-helloworld.war) in 27ms WFLYSRV0009: Undeployed "jboss-helloworld.war" (runtime-name: "jboss-helloworld.war")
7.4.2. Deploy an Application in a Managed Domain Using Maven
The following instructions show how to deploy and undeploy the JBoss EAP helloworld
quickstart in a managed domain using Maven.
See Using the Quickstart Examples in the JBoss EAP Getting Started Guide for more information on the JBoss EAP quickstarts.
Deploy an Application
When deploying an application in a managed domain, you must specify the server groups to which the application should be deployed. This is configured in the Maven pom.xml
file.
The following configuration in the pom.xml
initializes the WildFly Maven Plugin and specifies main-server-group
as the server group to which the application should be deployed.
<plugin> <groupId>org.wildfly.plugins</groupId> <artifactId>wildfly-maven-plugin</artifactId> <version>${version.wildfly.maven.plugin}</version> <configuration> <domain> <server-groups> <server-group>main-server-group</server-group> </server-groups> </domain> </configuration> </plugin>
From the helloworld
quickstart directory, execute the following Maven command.
$ mvn clean install wildfly:deploy
After issuing the Maven command to deploy, the terminal window shows the following output indicating a successful deployment.
[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 4.005 s [INFO] Finished at: 2016-09-02T14:36:17-04:00 [INFO] Final Memory: 21M/226M [INFO] ------------------------------------------------------------------------
The deployment can also be confirmed by viewing the server log of the active server instance.
WFLYSRV0027: Starting deployment of "jboss-helloworld.war" (runtime-name: "jboss-helloworld.war") WFLYUT0021: Registered web context: /jboss-helloworld WFLYSRV0010: Deployed "jboss-helloworld.war" (runtime-name : "jboss-helloworld.war")
Undeploy an Application
From the helloworld
quickstart directory, execute the following Maven command.
$ mvn wildfly:undeploy
After issuing the Maven command to undeploy, the terminal window shows the following output indicating a successful undeployment.
[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.750 s [INFO] Finished at: 2016-09-02T14:45:10-04:00 [INFO] Final Memory: 10M/184M [INFO] ------------------------------------------------------------------------
The undeployment can also be confirmed by viewing the server log of the active server instance.
WFLYUT0022: Unregistered web context: /jboss-helloworld WFLYSRV0028: Stopped deployment jboss-helloworld.war (runtime-name: jboss-helloworld.war) in 106ms WFLYSRV0009: Undeployed "jboss-helloworld.war" (runtime-name: "jboss-helloworld.war")
7.5. Deploying Applications Using the HTTP API
Applications can be deployed to JBoss EAP using the HTTP API with the curl
command. For more information on using the HTTP API, see the HTTP API section.
7.5.1. Deploy an Application to a Standalone Server Using the HTTP API
By default, the HTTP API is accessible at http://HOST:PORT/management
, for example, http://localhost:9990/management
.
Deploy an Application
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "composite", "address" : [], "steps" : [{"operation" : "add", "address" : {"deployment" : "test-application.war"}, "content" : [{"url" : "file:/path/to/test-application.war"}]},{"operation" : "deploy", "address" : {"deployment" : "test-application.war"}}],"json.pretty":1}'
Undeploy an Application
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "composite", "address" : [], "steps" : [{"operation" : "undeploy", "address" : {"deployment" : "test-application.war"}},{"operation" : "remove", "address" : {"deployment" : "test-application.war"}}],"json.pretty":1}'
See this Red Hat Knowledgebase article to learn more about programmatically generating the JSON requests.
7.5.2. Deploy an Application in a Managed Domain Using the HTTP API
By default, the HTTP API is accessible at http://HOST:PORT/management
, for example, http://localhost:9990/management
.
Deploy an Application
Add the deployment to the content repository.
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "add", "address" : {"deployment" : "test-application.war"}, "content" : [{"url" : "file:/path/to/test-application.war"}],"json.pretty":1}'
Add the deployment to the desired server group.
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "add", "address" : {"server-group" : "main-server-group","deployment":"test-application.war"},"json.pretty":1}'
Deploy the application to the server group.
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "deploy", "address" : {"server-group" : "main-server-group","deployment":"test-application.war"},"json.pretty":1}'
Undeploy an Application
Remove the deployment from all server groups to which it is assigned.
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "remove", "address" : {"server-group" : "main-server-group","deployment":"test-application.war"},"json.pretty":1}'
Remove the deployment from the content repository.
$ curl --digest -L -D - http://HOST:PORT/management --header "Content-Type: application/json" -u USER:PASSWORD -d '{"operation" : "remove", "address" : {"deployment" : "test-application.war"}, "json.pretty":1}'
7.6. Customizing Deployment Behavior
7.6.1. Define a Custom Directory for Deployment Content
You can define a custom location for JBoss EAP to store deployed content.
Define a Custom Directory for a Standalone Server
By default, deployed content for a standalone server is stored in the EAP_HOME/standalone/data/content
directory. This location can be changed by passing in the -Djboss.server.deploy.dir
argument when starting the server.
$ EAP_HOME/bin/standalone.sh -Djboss.server.deploy.dir=/path/to/new_deployed_content
The chosen location should be unique among JBoss EAP instances.
The jboss.server.deploy.dir
property specifies the directory to be used for storing content that has been deployed using the management console or management CLI. To define a custom deployment directory to be monitored by the deployment scanner, see Configure the Deployment Scanner.
Define a Custom Directory for a Managed Domain
By default, deployed content for a managed domain is stored in the EAP_HOME/domain/data/content
directory. This location can be changed by passing in the -Djboss.domain.deployment.dir
argument when starting the domain.
$ EAP_HOME/bin/domain.sh -Djboss.domain.deployment.dir=/path/to/new_deployed_content
The chosen location should be unique among JBoss EAP instances.
7.6.2. Control the Order of Deployments
JBoss EAP offers fine-grained control over the order of deployments when the server is started. Strict order of the deployment of applications present in multiple EAR files can be specified along with persistence of the order after a restart.
You can use the jboss-all.xml
deployment descriptor to declare dependencies between top-level deployments.
For example, if you have an app.ear
that depends on framework.ear
being deployed first, then you can create an app.ear/META-INF/jboss-all.xml
file as shown below.
<jboss umlns="urn:jboss:1.0"> <jboss-deployment-dependencies xmlns="urn:jboss:deployment-dependencies:1.0"> <dependency name="framework.ear" /> </jboss-deployment-dependencies> </jboss>
You can use the deployment’s runtime name as the dependency name in the jboss-all.xml
file.
This ensures that framework.ear
is deployed before app.ear
.
Although the jboss-all.xml
file and other deployment descriptors allow you to declare dependencies that the server does not otherwise detect, it is not a strict ordering feature. JBoss EAP assumes that all dependencies specified in the deployment descriptor have already been deployed or are available. If there are missing dependencies, JBoss EAP does not automatically deploy them, and the deployment fails.
7.6.3. Override Deployment Content
A deployment overlay can be used to overlay content into an existing deployment without physically modifying the contents of the deployment archive. It allows you to override deployment descriptors, JAR files, classes, JSP pages, and other files at runtime without rebuilding the archive.
This can be useful if you need to adapt a deployment for different environments that need different configurations or settings. For example, when moving a deployment through the application lifecycle from development, to testing, to stage, and finally into production, you might want to swap deployment descriptors, modify static web resources to change the branding of the application, or even replace JAR libraries with different versions depending on the target environment. It is also a useful feature for installations that need to change a configuration but can not modify or crack an archive due to policy or security restrictions.
When defining a deployment overlay, you specify the file on a file system that will replace the file in the deployment archive. You must also specify which deployments should be affected by the deployment overlay. Any affected deployments must be redeployed in order for the changes to take effect.
Use the deployment-overlay add
management CLI command to add a deployment overlay.
deployment-overlay add --name=new-deployment-overlay --content=WEB-INF/web.xml=/path/to/other/web.xml --deployments=test-application.war --redeploy-affected
In a managed domain, specify the applicable server groups by using --server-groups
or specify all server groups with --all-server-groups
.
Once created, you can add content to an existing overlay, link the overlay to a deployment, or remove the overlay. For full usage details, execute deployment-overlay --help
.
Parameters
name
- The name of the deployment overlay.
content
-
Comma-separated list that maps the file on the file system to the file in the archive that it will replace. The format for each entry is
ARCHIVE_PATH=FILESYSTEM_PATH
. deployments
- Comma-separated list of deployments to which this overlay will be linked.
redeploy-affected
- Redeploys all affected deployments.
7.6.4. Using Rollout Plans
About Rollout Plans
In a managed domain, operations targeted at domain or host level resources can potentially impact multiple servers. Such operations can include a roll out plan detailing the sequence in which the operation would be applied to the servers, as well as the policies for detailing whether the operation could be reverted if it fails to execute successfully on some servers. If no rollout plan is specified, the default rollout plan is used.
Below is an example rollout plan involving five server groups. Operations can be applied to server groups serially (in-series
) or concurrently (concurrent-groups
). The syntax is described in more detail in Rollout Plan Syntax.
{"my-rollout-plan" => {"rollout-plan" => { "in-series" => [ {"concurrent-groups" => { "group-A" => { "max-failure-percentage" => "20", "rolling-to-servers" => "true" }, "group-B" => undefined }}, {"server-group" => {"group-C" => { "rolling-to-servers" => "false", "max-failed-servers" => "1" }}}, {"concurrent-groups" => { "group-D" => { "max-failure-percentage" => "20", "rolling-to-servers" => "true" }, "group-E" => undefined }} ], "rollback-across-groups" => "true" }}}
Looking at the example above, applying the operation to the servers in the domain is done in three phases. If the policy for any server group triggers a rollback of the operation across the server group, all other server groups will be rolled back as well.
- Server groups group-A and group-B will have the operation applied concurrently. The operation will be applied to the servers in group-A in series, while all servers in group-B will handle the operation concurrently. If more than 20% of the servers in group-A fail to apply the operation, it will be rolled back across that group. If any servers in group-B fail to apply the operation it will be rolled back across that group.
- Once all servers in group-A and group-B are complete, the operation will be applied to the servers in group-C. Those servers will handle the operation concurrently. If more than one server in group-C fails to apply the operation it will be rolled back across that group.
- Once all servers in group-C are complete, server groups group-D and group-E will have the operation applied concurrently. The operation will be applied to the servers in group-D in series, while all servers in group-E will handle the operation concurrently. If more than 20% of the servers in group-D fail to apply the operation, it will be rolled back across that group. If any servers in group-E fail to apply the operation it will be rolled back across that group.
Rollout Plan Syntax
You can specify a rollout plan in either of the following ways.
-
By defining the rollout plan in the
deploy
command operation headers. See Deploy Using a Rollout Plan for details. -
By storing the rollout plan using the
rollout-plan
command and then referencing the plan name in thedeploy
command operation headers. See Deploy Using a Stored Rollout Plan for details.
Although each method has a different initial command, both methods use the rollout
operation header to define the rollout plan. This uses the following syntax.
rollout (id=PLAN_NAME | SERVER_GROUP_LIST) [rollback-across-groups]
-
PLAN_NAME
is the name for the rollout plan that was stored using therollout-plan
command. SERVER_GROUP_LIST
is the list of server groups. Use a comma (,
) to separate multiple server groups to indicate that that operations should be performed on each server group sequentially. Use a caret (^
) separator to indicate that operations should be performed on each server group concurrently.For each server group, set any of the following policies in parentheses. Comma separate multiple policies.
-
rolling-to-servers
: A boolean which if set totrue
, the operation will be applied to each server in the group in series. If the value isfalse
or not specified, the operation will be applied to the servers in the group concurrently. -
max-failed-servers
: An integer which takes the maximum number of servers in the group that can fail to apply the operation before it should be reverted on all servers in the group. The default value if not specified is0
, meaning that a failure on any server will trigger rollback across the group. max-failure-percentage
: An integer between0
and100
that represents the maximum percentage of the total number of servers in the group that can fail to apply the operation before it should be reverted on all servers in the group. The default value if not specified is0
, meaning that a failure on any server will trigger rollback across the group.NoteIf both
max-failed-servers
andmax-failure-percentage
are set to non-zero values,max-failure-percentage
takes precedence.
-
-
rollback-across-groups
: A boolean that indicates whether the need to rollback the operation on all the servers in one server group triggers a rollback across all the server groups. This defaults tofalse
.
Deploy Using a Rollout Plan
You can provide the full details of a rollout plan directly to the deploy
command by passing the rollout
settings into the headers
argument. See the Rollout Plan Syntax for more information on the format.
The following management CLI command deploys an application to the main-server-group
server group using a deployment plan that specifies rolling-to-servers=true
for serial deployment.
deploy /path/to/test-application.war --server-groups=main-server-group --headers={rollout main-server-group(rolling-to-servers=true)}
Deploy Using a Stored Rollout Plan
Since rollout plans can be complex, you have the option to store the details of a rollout plan. This allows you to reference the rollout plan name when you want to use it instead of requiring the full details of the rollout plan each time.
Use the
rollout-plan
management CLI command to store a rollout plan. See the Rollout Plan Syntax for more information on the format.rollout-plan add --name=my-rollout-plan --content={rollout main-server-group(rolling-to-servers=false,max-failed-servers=1),other-server-group(rolling-to-servers=true,max-failure-percentage=20) rollback-across-groups=true}
This creates the following deployment plan.
"rollout-plan" => { "in-series" => [ {"server-group" => {"main-server-group" => { "rolling-to-servers" => false, "max-failed-servers" => 1 }}}, {"server-group" => {"other-server-group" => { "rolling-to-servers" => true, "max-failure-percentage" => 20 }}} ], "rollback-across-groups" => true }
Specify the stored rollout plan name when deploying the application.
The following management CLI command deploys an application to all server groups using the
my-rollout-plan
stored rollout plan.deploy /path/to/test-application.war --all-server-groups --headers={rollout id=my-rollout-plan}
Remove a Stored Rollout Plan
You can remove a stored rollout plan using the rollout-plan
management CLI command by specifying the name of the rollout plan to remove.
rollout-plan remove --name=my-rollout-plan
Default Rollout Plan
All operations that impact multiple servers will be executed with a rollout plan. If no rollout plan is specified in the operation request, a default rollout plan will be generated. The plan will have the following characteristics.
- There will only be a single high-level phase. All server groups affected by the operation will have the operation applied concurrently.
- Within each server group, the operation will be applied to all servers concurrently.
- Failure on any server in a server group will cause rollback across the group.
- Failure of any server group will result in rollback of all other server groups.
Chapter 8. Domain Management
This section discusses concepts and configuration specific to the managed domain operating mode.
For information on securing a managed domain, see the Securing a Managed Domain section of the JBoss EAP How to Configure Server Security guide.
8.1. About Managed Domains
The managed domain operating mode allows for the management of multiple JBoss EAP instances from a single control point.
Centrally-managed JBoss EAP server collections are known as members of a domain. All JBoss EAP instances in a domain share a common management policy.
A domain consists of one domain controller, one or more host controllers, and zero or more server groups per host.

A domain controller is the central point from which the domain is controlled. It ensures that each server is configured according to the management policy of the domain. The domain controller is also a host controller.
A host controller is a physical or virtual host that interacts with the domain controller to control the lifecycle of the application server instances running on its host and to assist the domain controller to manage them. Each host can contain multiple server groups.
A server group is a set of server instances which have JBoss EAP installed on them and are managed and configured as one. The domain controller manages the configuration of and applications deployed onto server groups. Consequently, each server in a server group shares the same configuration and deployments.
Host controllers are tied to specific physical (or virtual) hosts. You can run multiple host controllers on the same hardware if you use different configurations, ensuring their ports and other resources do not conflict. It is possible for a domain controller, a single host controller, and multiple servers to run within the same JBoss EAP instance, on the same physical system.
8.1.1. About the Domain Controller
A domain controller is the JBoss EAP server instance that acts as a central management point for a domain. One host controller instance is configured to act as a domain controller.
The primary responsibilities of the domain controller are:
- Maintain the domain’s central management policy.
- Ensure all host controllers are aware of its current contents.
- Assist the host controllers in ensuring that all running JBoss EAP server instances are configured in accordance with this policy.
By default, the central management policy is stored in the EAP_HOME/domain/configuration/domain.xml
file. This file is required in this directory of the host controller that is set to run as the domain controller.
The domain.xml
file contains profile configurations available for use by the servers in the domain. A profile contains the detailed settings of the various subsystems available in that profile. The domain configuration also includes the definition of socket groups and the server group definitions.
It is possible for a JBoss EAP 7 domain controller to administer JBoss EAP 6 hosts and servers, as long as the hosts and servers are running JBoss EAP 6.2 or later. For more information, see Configure a JBoss EAP 7 Domain Controller to Administer JBoss EAP 6 Instances.
For more information, see the Start a Managed Domain and Configure the Domain Controller sections.
8.1.2. About Host Controllers
The primary responsibility of a host controller is server management. It delegates domain management tasks and is responsible for starting and stopping the individual application server processes that run on its host.
It interacts with the domain controller to help manage the communication between the servers and the domain controller. Multiple host controllers of a domain can interact with only a single domain controller. Hence, all the host controllers and server instances running on a single domain mode have a single domain controller and must belong to the same domain.
By default, each host controller reads its configuration from the EAP_HOME/domain/configuration/host.xml
file located in the unzipped JBoss EAP installation file on its host’s file system. The host.xml
file contains the following configuration information that is specific to the particular host:
- The names of the server instances meant to run from this installation.
-
Configurations specific to the local physical installation. For example, named interface definitions declared in
domain.xml
can be mapped to an actual machine-specific IP address inhost.xml
. And abstract path names in domain.xml can be mapped to actual file system paths inhost.xml
. Any of the following configurations:
- How the host controller contacts the domain controller to register itself and access the domain configuration.
- How to find and contact a remote domain controller.
- Whether the host controller is to act as the domain controller
For more information, see the Start a Managed Domain and Configure Host Controllers sections.
8.1.3. About Process Controllers
A process controller is a small, lightweight process that is responsible for spawning the host controller process and monitoring its lifecycle. If the host controller crashes, the process controller will restart it. It also starts server processes as directed by the host controller; however, it will not automatically restart server processes that crash.
The process controller logs to the EAP_HOME/domain/log/process-controller.log
file. You can set JVM options for the process controller in the EAP_HOME/bin/domain.conf
file using the PROCESS_CONTROLLER_JAVA_OPTS
variable.
8.1.4. About Server Groups
A server group is a collection of server instances that are managed and configured as one. In a managed domain, every application server instance belongs to a server group, even if it is the only member. The server instances in a group share the same profile configuration and deployed content.
A domain controller and a host controller enforce the standard configuration on all server instances of every server group in its domain.
A domain can consist of multiple server groups. Different server groups can be configured with different profiles and deployments. A domain can be configured with different server tiers providing different services, for example.
Different server groups can also have the same profile and deployments. This can, for example, allow for rolling application upgrades where the application is upgraded on one server group and then updated on a second server group, avoiding a complete service outage.
For more information, see the Configuring Server Groups section.
8.1.5. About Servers
A server represents an application server instance. In a managed domain, all server instances are members of a server group. The host controller launches each server instance in its own JVM process.
For more information, see the Configuring Servers section.
8.2. Navigating Domain Configurations
JBoss EAP provides scalable management interfaces to support both small and large-scale managed domains.
Management Console
The JBoss EAP management console provides a graphical view of your domain and allows you to easily manage hosts, servers, deployments, and profiles for your domain.
- Configuration
From the Configuration tab, you can configure the subsystems for each profile used in your domain. Different server groups in your domain may use different profiles depending the capabilities needed.
Once you select the desired profile, all available subsystems for that profile are listed. For more information on configuring profiles, see Managing JBoss EAP Profiles.
- Runtime
From the Runtime tab, you can manage servers and server groups as well as host configuration. You can browse the domain by host or by server group.
From Hosts, you can configure host properties and JVM settings as well as add and configure servers for that host.
From Server Groups, you can add new server groups and configure properties and JVM settings as well as add and configure servers for that server group. You can perform operations such as starting, stopping, suspending, and reloading all servers in the selected server group.
From either Hosts or Server Groups, you can add new servers and configure server properties and JVM settings. You can perform operations such as starting, stopping, suspending, and reloading the selected server. You can also view runtime information, such as JVM usage, server logs, and subsystem-specific information.
- Deployments
From the Deployments tab, you can add and assign deployments to server groups. You can view all deployments in the content repository, view all unassigned deployments, or view deployments assigned to a particular server group.
For more information on deploying applications using the management console, see Deploy an Application in a Managed Domain
Management CLI
The JBoss EAP management CLI provides a command-line interface to manage hosts, servers, deployments and profiles for your domain.
Subsystem configuration can be accessed once the appropriate profile is selected.
/profile=PROFILE_NAME/subsystem=SUBSYSTEM_NAME:read-resource(recursive=true)
Instructions and examples throughout this guide may contain management CLI commands for subsystem configuration that apply when running as a standalone server, for example:
/subsystem=datasources/data-source=ExampleDS:read-resource
To adjust these management CLI commands to be run in a managed domain, you must specify the appropriate profile to configure, for example:
/profile=default/subsystem=datasources/data-source=ExampleDS:read-resource
After specifying the appropriate host, you can configure host settings and perform operations on servers on that host.
/host=HOST_NAME/server=SERVER_NAME:read-resource
After specifying the appropriate host, you can configure servers for that host.
/host=HOST_NAME/server-config=SERVER_NAME:write-attribute(name=ATTRIBUTE_NAME,value=VALUE)
After specifying the appropriate server group, you can configure server group settings and perform operations on all servers in the selected server group.
/server-group=SERVER_GROUP_NAME:read-resource
You can deploy applications in a managed domain by using the deploy
management CLI command and specifying the appropriate server groups. For instructions, see Deploy an Application in a Managed Domain
8.3. Launching a Managed Domain
8.3.1. Start a Managed Domain
Domain and host controllers can be started using the domain.sh
or domain.bat
script provided with JBoss EAP. For a complete listing of all available startup script arguments and their purposes, use the --help
argument or see the Server Runtime Arguments section.
The domain controller must be started before any slave servers in any server groups in the domain. Start the domain controller first, then start any other associated host controllers in the domain.
Start the Domain Controller
Start the domain controller with the host-master.xml
configuration file, which is preconfigured for a dedicated domain controller.
$ EAP_HOME/bin/domain.sh --host-config=host-master.xml
Depending on your domain setup, you will need to make additional configurations to allow host controllers to connect. Also see the following example domain setups:
Start a Host Controller
Start the host controller with the host-slave.xml
configuration file, which is preconfigured for a slave host controller.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
Depending on your domain setup, you will need to make additional configurations connect to, and not conflict with, the domain controller. Also see the following example domain setups:
8.3.2. Configure the Domain Controller
It is not supported to configure multiple domain or host controllers on the same machine when using the RPM installation method to install JBoss EAP.
Configure a Host to Act as the Domain Controller
A host is designated to be the domain controller if it includes the <local/>
element in the <domain-controller>
declaration.
<domain-controller> <local/> </domain-controller>
The host acting as the domain controller must expose a management interface that is accessible to other hosts in the domain. It is not required to expose an HTTP(S) management interface, but is recommended as it allows access to the management console.
<management-interfaces> <native-interface security-realm="ManagementRealm"> <socket interface="management" port="${jboss.management.native.port:9999}"/> </native-interface> <http-interface security-realm="ManagementRealm" http-upgrade-enabled="true"> <socket interface="management" port="${jboss.management.http.port:9990}"/> </http-interface> </management-interfaces>
The EAP_HOME/domain/configuration/host-master.xml
file is already preconfigured with these settings to act as the domain controller.
8.3.3. Configure Host Controllers
It is not supported to configure multiple domain or host controllers on the same machine when using the RPM installation method to install JBoss EAP.
Connect to the Domain Controller
A host controller must be provided with the means to connect to the domain controller so that it can register itself with the domain. This is configured in the <domain-controller>
element of the configuration.
<domain-controller> <remote security-realm="ManagementRealm"> <discovery-options> <static-discovery name="primary" protocol="${jboss.domain.master.protocol:remote}" host="${jboss.domain.master.address}" port="${jboss.domain.master.port:9999}"/> </discovery-options> </remote> </domain-controller>
The EAP_HOME/domain/configuration/host-slave.xml
file is already preconfigured with these settings to connect to the domain controller. You will need to provide the jboss.domain.master.address
property when starting the host controller.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml -Djboss.domain.master.address=IP_ADDRESS
For more information on domain controller discovery, see the Domain Controller Discovery and Failover section.
Depending on your domain setup, you may also need to provide authentication for the host controller to be authenticated by the domain controller. See Set Up a Managed Domain on Two Machines for details on generating a management user with a secret value and updating the host controller configuration with that value.
8.3.3.1. Configure the Name of a Host
Every host running in a managed domain must have a unique host name. To ease administration and allow for the use of the same host configuration files on multiple hosts, the server uses the following precedence for determining the host name.
-
If set, the host element name attribute in the
host.xml
configuration file. -
The value of the
jboss.host.name
system property. -
The value that follows the final period (
.
) character in thejboss.qualified.host.name
system property, or the entire value if there is no final period (.
) character. -
The value that follows the period (
.
) character in theHOSTNAME
environment variable for POSIX-based operating systems, theCOMPUTERNAME
environment variable for Microsoft Windows, or the entire value if there is no final period (.
) character.
A host controller’s name is configured in the host
element at the top of the relevant host.xml
configuration file, for example:
<host xmlns="urn:jboss:domain:4.0" name="host1">
Use the following procedure to update the host name using the management CLI.
Start the JBoss EAP host controller.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
Launch the management CLI, connecting to the domain controller.
$ EAP_HOME/bin/jboss-cli.sh --connect --controller=DOMAIN_CONTROLLER_IP_ADDRESS
Use the following command to set a new host name.
/host=EXISTING_HOST_NAME:write-attribute(name=name,value=NEW_HOST_NAME)
This modifies the host name attribute in the
host-slave.xml
file as follows:<host name="NEW_HOST_NAME" xmlns="urn:jboss:domain:4.0">
Reload the host controller in order for the changes to take effect.
reload --host=EXISTING_HOST_NAME
If a host controller does not have a name set in the configuration file, you can also pass in the host name at runtime.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml -Djboss.host.name=HOST_NAME
8.3.4. Domain Controller Discovery and Failover
When setting up a managed domain, each host controller must be configured with information needed to contact the domain controller. In JBoss EAP, each host controller can be configured with multiple options for finding the domain controller. Host controllers iterate through the list of options until one succeeds.
This allows host controllers to be preconfigured with contact information for a backup domain controller. A backup host controller can be promoted to master if there is a problem with the primary domain controller, allowing host controllers to automatically fail over to the new master once it’s been promoted.
The following is an example of how to configure a host controller with multiple options for finding the domain controller.
Example: A Host Controller with Multiple Domain Controller Options
<domain-controller> <remote security-realm="ManagementRealm"> <discovery-options> <static-discovery name="primary" protocol="${jboss.domain.master.protocol:remote}" host="172.16.81.100" port="${jboss.domain.master.port:9999}"/> <static-discovery name="backup" protocol="${jboss.domain.master.protocol:remote}" host="172.16.81.101" port="${jboss.domain.master.port:9999}"/> </discovery-options> </remote> </domain-controller>
A static discovery option includes the following required attributes:
- name
- The name for this domain controller discovery option.
- host
- The remote domain controller’s host name.
- port
- The remote domain controller’s port.
In the example above, the first discovery option is the one expected to succeed. The second can be used in failover situations.
If a problem arises with the primary domain controller, a host controller that was started with the --backup
option can be promoted to act as the domain controller.
Starting a host controller with the --backup
option will cause that controller to maintain a local copy of the domain configuration. This configuration will be used if the host controller is reconfigured to act as the domain controller.
Promote a Host Controller to Be the Domain Controller
- Ensure the original domain controller is stopped.
- Use the management CLI to connect to the host controller that is to become the new domain controller.
Execute the following command to configure the host controller to act as the new domain controller.
/host=HOST_NAME:write-local-domain-controller
Execute the following command to reload the host controller.
reload --host=HOST_NAME
This host controller will now act as the domain controller.
8.4. Managing Servers
8.4.1. Configure Server Groups
The following is an example of a server group definition:
<server-group name="main-server-group" profile="full"> <jvm name="default"> <heap size="64m" max-size="512m"/> </jvm> <socket-binding-group ref="full-sockets"/> <deployments> <deployment name="test-application.war" runtime-name="test-application.war"/> <deployment name="jboss-helloworld.war" runtime-name="jboss-helloworld.war" enabled="false"/> </deployments> </server-group>
Server groups can be configured using the management CLI or from the management console Runtime tab.
Add a Server Group
The following management CLI command can be used to add a server group.
/server-group=SERVER_GROUP_NAME:add(profile=PROFILE_NAME,socket-binding-group=SOCKET_BINDING_GROUP_NAME)
Update a Server Group
The following management CLI command can be used to update server group attributes.
/server-group=SERVER_GROUP_NAME:write-attribute(name=ATTRIBUTE_NAME,value=VALUE)
Remove a Server Group
The following management CLI command can be used to remove a server group.
/server-group=SERVER_GROUP_NAME:remove
Server Group Attributes
A server group requires the following attributes:
-
name
: The server group name. -
profile
: The server group profile name. -
socket-binding-group
: The default socket binding group used for servers in the group. This can be overridden on a per-server basis.
A server group includes the following optional attributes:
-
management-subsystem-endpoint
: Set totrue
to have servers belonging to the server group connect back to the host controller using the endpoint from theirremoting
subsystem (theremoting
subsystem must be present for this to work). -
socket-binding-default-interface
: The socket binding group default interface for this server. -
socket-binding-port-offset
: The default offset to be added to the port values given by the socket binding group. -
deployments
: The deployment content to be deployed on the servers in the group. -
jvm
: The default JVM settings for all servers in the group. The host controller merges these settings with any other configuration provided inhost.xml
to derive the settings used to launch the server’s JVM. -
deployment-overlays
: Links between a defined deployment overlay and deployments in this server group. -
system-properties
: The system properties to be set on servers in the group.
8.4.2. Configure Servers
The default host.xml
configuration file defines three servers:
<servers> <server name="server-one" group="main-server-group"> </server> <server name="server-two" group="main-server-group" auto-start="true"> <socket-bindings port-offset="150"/> </server> <server name="server-three" group="other-server-group" auto-start="false"> <socket-bindings port-offset="250"/> </server> </servers>
A server instance named server-one
is associated with main-server-group
and inherits the subsystem configuration and socket bindings specified by that server group. A server instance named server-two
is also associated with main-server-group
, but also defines a socket binding port-offset
value, so as not to conflict with the port values used by server-one
. A server instance named server-three
is associated with other-server-group
and uses that group’s configurations. It also defines a port-offset
value and sets auto-start
to false
so that this server does not start when the host controller starts.
Servers can be configured using the management CLI or from the management console Runtime tab.
Add a Server
The following management CLI command can be used to add a server.
/host=HOST_NAME/server-config=SERVER_NAME:add(group=SERVER_GROUP_NAME)
Update a Server
The following management CLI command can be used to update server attributes.
/host=HOST_NAME/server-config=SERVER_NAME:write-attribute(name=ATTRIBUTE_NAME,value=VALUE)
Remove a Server
The following management CLI command can be used to remove a server.
/host=HOST_NAME/server-config=SERVER_NAME:remove
Server Attributes
A server requires the following attributes:
-
name
: The name of the server. -
group
: The name of a server group from the domain model.
A server includes the following optional attributes:
-
auto-start
: Whether or not this server should be started when the host controller starts. -
socket-binding-group
: The socket binding group to which this server belongs. -
socket-binding-port-offset
: An offset to be added to the port values given by the socket binding group for this server. -
update-auto-start-with-server-status
: Update theauto-start
attribute with the status of the server. -
interface
: A list of fully-specified named network interfaces available for use on the server. -
jvm
: The JVM settings for this server. If not declared, the settings are inherited from the parent server group or host. -
path
: A list of named file system paths. -
system-property
: A list of system properties to set on this server.
8.4.3. Start and Stop Servers
You can perform operations on servers, such as starting, stopping, and reloading, from the management console by navigating to the Runtime tab and selecting the appropriate host or server group.
See the below commands for performing these operations using the management CLI.
Start Servers
You can start a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:start
You can start all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:start-servers
Stop Servers
You can stop a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:stop
You can stop all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:stop-servers
Reload Servers
You can reload a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:reload
You can reload all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:reload-servers
8.5. Managed Domain Setups
8.5.1. Set Up a Managed Domain on a Single Machine
You can run multiple host controllers on a single machine by using the jboss.domain.base.dir
property.
It is not supported to configure more than one JBoss EAP host controller as a system service on a single machine.
Copy the
EAP_HOME/domain
directory for the domain controller.$ cp -r EAP_HOME/domain /path/to/domain1
Copy the
EAP_HOME/domain
directory for a host controller.$ cp -r EAP_HOME/domain /path/to/host1
Start the domain controller using
/path/to/domain1
.$ EAP_HOME/bin/domain.sh --host-config=host-master.xml -Djboss.domain.base.dir=/path/to/domain1
Start the host controller using
/path/to/host1
.$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml -Djboss.domain.base.dir=/path/to/host1 -Djboss.domain.master.address=IP_ADDRESS -Djboss.management.native.port=PORT
NoteWhen starting a host controller, you must specify the address of the domain controller using the
jboss.domain.master.address
property.Additionally, since this host controller is running on the same machine as the domain controller, you must change the management interface so that it does not conflict with the domain controller’s management interface. This command sets the
jboss.management.native.port
property.
Each instance started in this manner will share the rest of the resources in the base installation directory (for example, EAP_HOME/modules/
), but use the domain configuration from the directory specified by jboss.domain.base.dir
.
8.5.2. Set Up a Managed Domain on Two Machines
You may need to configure your firewall to run this example.
You can create managed domain on two machines, where one machine is a domain controller and the other machine is a host. For more information, see About the Domain Controller.
-
IP1
= IP address of the domain controller (Machine 1) -
IP2
= IP address of the host (Machine 2)
Create a Managed Domain on Two Machines
On Machine 1
Add a management user so that the host can be authenticated by the domain controller.
Use the
add-user.sh
script to add the management user for the host controller (HOST_NAME
). Make sure to answeryes
to the last prompt and note the secret value provided (<secret value="SECRET_VALUE" />
). This secret value will be used in the host controller configuration.Start the domain controller.
Specify the
host-master.xml
configuration file, which is preconfigured for a dedicated domain controller. Also, set thejboss.bind.address.management
property to make the domain controller visible to other machines.$ EAP_HOME/bin/domain.sh --host-config=host-master.xml -Djboss.bind.address.management=IP1
On Machine 2
Update the host configuration with the user credentials.
Edit
EAP_HOME/domain/configuration/host-slave.xml
and set the host name (HOST_NAME
) and secret value (SECRET_VALUE
).<host xmlns="urn:jboss:domain:1.6" name="HOST_NAME"> <management> <security-realms> <security-realm name="ManagementRealm"> <server-identities> <secret value="SECRET_VALUE" /> </server-identities> ...
Start the host controller.
Specify the
host-slave.xml
configuration file, which is preconfigured for a slave host controller. Also, set thejboss.domain.master.address
property to connect to the domain controller and thejboss.bind.address
property to set the host controller bind address.$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml -Djboss.domain.master.address=IP1 -Djboss.bind.address=IP2
You can now manage the domain from the management CLI by specifying the domain controller address with the --controller
parameter when launching.
$ EAP_HOME/bin/jboss-cli.sh --connect --controller=IP1
Or you can manage the domain from the management console at http://IP1:9990
.
8.5.3. Configure a JBoss EAP 7 Domain Controller to Administer JBoss EAP 6 Instances
A JBoss EAP 7 domain controller can manage hosts and servers running older versions of JBoss EAP as long as the following conditions are met.
- The JBoss EAP instances must be JBoss EAP 6.2 or later.
- The JBoss EAP version of the domain controller must be higher than or equal to the version on the host controllers that it manages.
Complete the following tasks to successfully manage JBoss EAP 6 instances in a JBoss EAP 7 managed domain.
Once these tasks are complete, you can manage your JBoss EAP 6 servers and configurations from the JBoss EAP 7 domain controller using the management CLI. Note that JBoss EAP 6 hosts will not be able to take advantage of new JBoss EAP 7 features, such as batch processing.
Because the management console is optimized for the latest version of JBoss EAP, you should not use it to update your JBoss EAP 6 hosts, servers, and profiles. Use the management CLI instead when managing your JBoss EAP 6 configurations from a JBoss EAP 7 managed domain.
8.5.3.1. Add the JBoss EAP 6 Configuration to the JBoss EAP 7 Domain Controller
To allow the domain controller to manage your JBoss EAP 6 servers, you must provide the JBoss EAP 6 configuration details in the JBoss EAP 7 domain configuration. You can do this by copying the JBoss EAP 6 profiles, socket binding groups, and server groups to the JBoss EAP 7 domain.xml
configuration file.
You will need to rename resources if any conflict with the existing names in the JBoss EAP 7 configuration. There are also some additional adjustments to make to ensure the proper behavior.
The following procedure uses the JBoss EAP 6 default
profile, standard-sockets
socket binding group, and main-server-group
server group.
-
Edit the JBoss EAP 7
domain.xml
configuration file. Copy the applicable JBoss EAP 6 profiles to the JBoss EAP 7
domain.xml
file.This procedure assumes that the JBoss EAP 6
default
profile was copied and renamed toeap6-default
.JBoss EAP 7
domain.xml
<profiles> ... <profile name="eap6-default"> ... </profile> </profiles>
Add the necessary extensions used by this profile.
If your JBoss EAP 6 profile uses subsystems that are no longer present in JBoss EAP 7, you must add the appropriate extensions to the JBoss EAP domain configuration.
JBoss EAP 7
domain.xml
<extensions> ... <extension module="org.jboss.as.configadmin"/> <extension module="org.jboss.as.threads"/> <extension module="org.jboss.as.web"/> <extensions>
Copy the applicable JBoss EAP 6 socket binding groups to the JBoss EAP 7
domain.xml
file.This procedure assumes that the JBoss EAP 6
standard-sockets
socket binding group was copied and renamed toeap6-standard-sockets
.JBoss EAP 7
domain.xml
<socket-binding-groups> ... <socket-binding-group name="eap6-standard-sockets" default-interface="public"> ... </socket-binding-group> </socket-binding-groups>
Copy the applicable JBoss EAP 6 server groups to the JBoss EAP 7
domain.xml
file.This procedure assumes that the JBoss EAP 6
main-server-group
server group was copied and renamed toeap6-main-server-group
. You must also update this server group to use the JBoss EAP 6 profile,eap6-default
, and the JBoss EAP 6 socket binding group,eap6-standard-sockets
.JBoss EAP 7
domain.xml
<server-groups> ... <server-group name="eap6-main-server-group" profile="eap6-default"> ... <socket-binding-group ref="eap6-standard-sockets"/> </server-group> </server-groups>
8.5.3.2. Update the Behavior for the JBoss EAP 6 Profiles
Additional updates to the profiles used by your JBoss EAP 6 instances are necessary depending on the JBoss EAP version and desired behavior. You may require additional changes depending on the subsystems and configuration that your existing JBoss EAP 6 instances use.
Start the JBoss EAP 7 domain controller and launch its management CLI to perform the following updates. These examples assume that the JBoss EAP 6 profile is eap6-default
.
Remove the
bean-validation
subsystem.JBoss EAP 7 moved bean validation functionality from the
ee
subsystem into its own subsystem,bean-validation
. If a JBoss EAP 7 domain controller sees a legacyee
subsystem, it adds the newbean-validation
subsystem. However, the JBoss EAP 6 hosts will not recognize this subsystem, so it must be removed.JBoss EAP 7 Domain Controller CLI
/profile=eap6-default/subsystem=bean-validation:remove
Set CDI 1.0 behavior.
This is only necessary if you want CDI 1.0 behavior for your JBoss EAP 6 servers, as opposed to behavior of later CDI versions used in JBoss EAP 7. If you want CDI 1.0 behavior, make the following updates to the
weld
subsystem.JBoss EAP 7 Domain Controller CLI
/profile=eap6-default/subsystem=weld:write-attribute(name=require-bean-descriptor,value=true) /profile=eap6-default/subsystem=weld:write-attribute(name=non-portable-mode,value=true)
Enable datasource statistics for JBoss EAP 6.2.
This is only necessary if your profile is being used by JBoss EAP 6.2 servers. JBoss EAP 6.3 introduced the
statistics-enabled
attribute, which defaults tofalse
to not collect statistics; however, the JBoss EAP 6.2 behavior was to collect statistics. If this profile is used by a JBoss EAP 6.2 host and a host running a newer JBoss EAP version, the behavior would be inconsistent between hosts, which is not allowed. Therefore, profiles intended for use by a JBoss EAP 6.2 host should make the following change for their datasources.JBoss EAP 7 Domain Controller CLI
/profile=eap6-default/subsystem=datasources/data-source=ExampleDS:write-attribute(name=statistics-enabled,value=true)
8.5.3.3. Set the Server Group for the JBoss EAP 6 Servers
If you renamed server groups, you will need to update the JBoss EAP 6 host configuration to use the new server groups specified in the JBoss EAP 7 configuration. This example uses the eap6-main-server-group
server group specified in the JBoss EAP 7 domain.xml
.
JBoss EAP 6 host-slave.xml
<servers> <server name="server-one" group="eap6-main-server-group"/> <server name="server-two" group="eap6-main-server-group"> <socket-bindings port-offset="150"/> </server> </servers>
A host cannot use features or configuration settings that were introduced in a newer version of JBoss EAP than the one the host is running.
8.5.3.4. Prevent the JBoss EAP 6 Instances from Receiving JBoss EAP 7 Updates
The domain controller in a managed domain forwards configuration updates to its host controllers. You must use the host-exclude
configuration to specify the resources that should be hidden from particular versions. Choose the appropriate preconfigured host-exclude
option for your JBoss EAP 6 version: EAP62
, EAP63
, EAP64
, or EAP64z
.
The active-server-groups
attribute of the host-exclude
configuration specifies the list of server groups that are used by a particular version. These server groups and their associated profiles, socket binding groups, and deployment resources will be available to hosts of this version, but all others will be hidden from these hosts.
This example assumes that the version is JBoss EAP 6.4.z and adds the JBoss EAP 6 server group, eap6-main-server-group
as an active server group.
JBoss EAP 7 Domain Controller CLI
/host-exclude=EAP64z:write-attribute(name=active-server-groups,value=[eap6-main-server-group])
If necessary, you can specify additional socket binding groups used by your servers using the active-socket-binding-groups
attribute. This is only required for socket binding groups that are not associated with the server groups specified in active-server-groups
.
8.6. Managing JBoss EAP Profiles
8.6.1. About Profiles
JBoss EAP uses profiles as a way to organize which subsystems are available to a server. A profile consists of a collection of available subsystems along with each subsystem’s specific configuration. A profile with a large number of subsystems results in a server with a large set of capabilities. A profile with a small, focused set of subsystems will have fewer capabilities but a smaller footprint.
JBoss EAP comes with four predefined profiles that should satisfy most use cases:
- default
-
Includes commonly used subsystems, such as
logging
,security
,datasources
,infinispan
,webservices
,ee
,ejb3
,transactions
, and so on. - ha
-
Includes the subsystems provided in the default profile with the addition of the
jgroups
andmodcluster
subsystems for high availability - full
-
Includes the subsystems provided in the default profile with the addition of the
messaging-activemq
andiiop-openjdk
subsystems - full-ha
-
Includes the subsystems provided in the full profile with the addition of the
jgroups
andmodcluster
subsystems for high availability
JBoss EAP offers the ability to disable extensions or unload drivers and other services manually by removing the subsystems from the configuration of existing profiles. However, for most cases this is unnecessary. Since JBoss EAP dynamically loads subsystems as they are needed, if the server or an application never use a subsystem, it will not be loaded.
In cases where the existing profiles do not provide the necessary capabilities, JBoss EAP also provides the ability to define custom profiles as well.
8.6.2. Cloning a Profile
JBoss EAP allows you to create a new profile in a managed domain by cloning an existing profile. This will create a copy of the original profile’s configuration and subsystems.
A profile can be cloned using the management CLI by using the clone
operation on the desired profile to clone.
/profile=full-ha:clone(to-profile=cloned-profile)
You can also clone a profile from the management console by selecting the desired profile to clone and clicking Clone.
8.6.3. Creating Hierarchical Profiles
In a managed domain, you can create a hierarchy of profiles. This allows you to create a base profile with common extensions that other profiles can inherit.
The managed domain defines several profiles in domain.xml
. If multiple profiles use the same configuration for a particular subsystem, you can configure it in just one place instead of different profiles. The values in parent profiles cannot be overridden.
A profile can include other profiles in a hierarchy using the management CLI by using the list-add
operation and providing the profile to include.
/profile=new-profile:list-add(name=includes, value=PROFILE_NAME)
Chapter 9. Configuring JVM Settings
Configuration of Java Virtual Machine (JVM) settings is different for a standalone JBoss EAP server, or a JBoss EAP server in a managed domain.
For a standalone JBoss EAP server instance, the server startup processes pass JVM settings to the JBoss EAP server at startup. These can be declared from the command line before launching JBoss EAP, or using the System Properties screen in the management console.
In a managed domain, JVM settings are declared in the host.xml
and domain.xml
configuration files, and can be configured at host, server group, or server levels.
System properties must be configured in JAVA_OPTS
to be used by JBoss EAP modules (such as the logging manager) during startup.
9.1. Configuring JVM Settings for a Standalone Server
JVM settings for standalone JBoss EAP server instances can be declared at runtime by setting the JAVA_OPTS
environment variable before starting the server.
An example of setting the JAVA_OPTS
environment variable on Linux is shown below.
$ export JAVA_OPTS="-Xmx1024M"
The same setting can be used in a Microsoft Windows environment:
set JAVA_OPTS="Xmx1024M"
Alternatively, JVM settings can be added to the standalone.conf
file in the EAP_HOME/bin
folder, which contains examples of options to pass to the JVM.
Setting the JAVA_OPTS
environment variable will override the default values from standalone.conf
, which may cause JBoss EAP startup issues.
9.2. Configuring JVM Settings for a Managed Domain
In a JBoss EAP managed domain, you can define JVM settings at multiple levels. You can define custom JVM settings on a particular host, and then apply those settings to server groups, or to individual server instances.
By default, server groups and individual servers will inherit the JVM settings from their parent, but you can choose to override JVM settings at each level.
The JVM settings in domain.conf
are applied to the Java process of the JBoss EAP host controller, and not the individual JBoss EAP server instances controlled by that host controller.
9.2.1. Defining JVM Settings on a Host Controller
You can define JVM settings on a host controller, and apply those settings to server groups or individual servers. JBoss EAP comes with a default
JVM setting, but the following management CLI command demonstrates creating a new JVM setting named production_jvm
with some custom JVM settings and options.
/host=HOST_NAME/jvm=production_jvm:add( heap-size=2048m, max-heap-size=2048m, max-permgen-size=512m, stack-size=1024k, jvm-options=["-XX:-UseParallelGC"] )
You can also create and edit JVM settings in the JBoss EAP management console by selecting the Runtime tab, selecting Hosts, and clicking JVM on the host you want to edit.
These settings are stored in the within the <jvm>
tag in host.xml
.
9.2.2. Applying JVM Settings to a Server Group
When creating a server group, you can specify a JVM configuration that all servers in the group will use. The following management CLI commands demonstrate creating a server group name groupA
that uses the production_jvm
JVM settings that were shown in the previous example.
/server-group=groupA:add(profile=default, socket-binding-group=standard-sockets) /server-group=groupA/jvm=production_jvm:add()
All servers in the server group will inherit JVM settings from production_jvm
.
You can also override specific JVM settings at the server group level. For example, to set a different heap size, you can use the following command:
/server-group=groupA/jvm=production_jvm:write-attribute(name=heap-size,value="1024m")
After applying the above command, the server group groupA
will inherit the JVM settings from production_jvm
, except for the heap size which has an overridden value of 1024m
.
You can also edit server group JVM settings in the JBoss EAP management console by selecting the Runtime tab, selecting Server Groups, and clicking View for the server group you want to edit.
These settings for a server group are stored in domain.xml
.
9.2.3. Applying JVM Settings to an Individual Server
By default, an individual JBoss EAP server instance will inherit the JVM settings of the server group it belongs to. However, you can choose to override the inherited settings with another complete JVM setting definition from the host controller, or choose to override specific JVM settings.
For example, the following command overrides the JVM definition of the server group in the previous example, and sets the JVM settings for server-one
to the default
JVM definition:
/host=HOST_NAME/server-config=server-one/jvm=default:add()
Also, similar to server groups, you can override specific JVM settings at the server level. For example, to set a different heap size, you can use the following command:
/host=HOST_NAME/server-config=server-one/jvm=default:write-attribute(name=heap-size,value="1024m")
You can also edit server JVM settings in the JBoss EAP management console by selecting the Runtime tab, selecting Hosts, selecting the relevant host. Then select the relevant server, and click View for the server you want to edit.
These settings for an individual server are stored in host.xml
.
9.3. Displaying the JVM Status
You can view the status of JVM resources, such as heap and thread usage, for standalone or managed domain servers from the management console. While statistics are not displayed in real time, you can click Refresh Results to provide an up-to-date overview of JVM resources.
To display the JVM status for a standalone JBoss EAP server:
- Select the Runtime tab, and then select Standalone Server. In the Monitor column, select JVM and click View.
To display the JVM status for a JBoss EAP server in a managed domain:
- Select the Runtime tab, and then select the server group and server that you want to view. In the Monitor column, select JVM and click View.
This shows the following heap usage information:
- Max
- The maximum amount of memory that can be used for memory management.
- Used
- The amount of used memory.
- Committed
- The amount of memory that is committed for the Java Virtual Machine to use.
Other information, such as JVM uptime and thread usage, is also available.
9.4. Specifying 32 or 64-bit JVM Architecture
In some environments, such as Hewlett-Packard HP-UX and Solaris, the -d32
or -d64
switch is used to specify whether to run in a 32-bit or 64-bit JVM. The default is 32-bit if neither option is indicated.
Specifying 64-Bit Architecture for a Standalone Server
-
Open
EAP_HOME/bin/standalone.conf
. -
Add the following line to append the
-d64
option toJAVA_OPTS
.
JAVA_OPTS="$JAVA_OPTS -d64"
Specifying 64-Bit Architecture for a Managed Domain
When running a managed domain, you can specify the 64-bit environment for host and process controllers in addition to server instances.
Set the host and process controllers to run in the 64-bit JVM.
-
Open
EAP_HOME/bin/domain.conf
. Add the following line to append the
-d64
option toJAVA_OPTS
. Ensure that this is inserted before wherePROCESS_CONTROLLER_JAVA_OPTS
andHOST_CONTROLLER_JAVA_OPTS
are set.JAVA_OPTS="$JAVA_OPTS -d64"
Example JVM options in
domain.conf
# # Specify options to pass to the Java VM. # if [ "x$JAVA_OPTS" = "x" ]; then JAVA_OPTS="-Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true" JAVA_OPTS="$JAVA_OPTS -Djboss.modules.system.pkgs=$JBOSS_MODULES_SYSTEM_PKGS -Djava.awt.headless=true" JAVA_OPTS="$JAVA_OPTS -Djboss.modules.policy-permissions=true" JAVA_OPTS="$JAVA_OPTS -d64" else echo "JAVA_OPTS already set in environment; overriding default settings with values: $JAVA_OPTS" fi
-
Open
Set the server instances to run in the 64-bit JVM.
Add
-d64
as a JVM option in your appropriate JVM configuration. The command below shows it being added to thedefault
JVM configuration./host=HOST_NAME/jvm=default:add-jvm-option(jvm-option="-d64")
Chapter 10. Mail Subsystem
10.1. Configuring the Mail Subsystem
The mail
subsystem allows you to configure mail sessions in JBoss EAP and then inject those sessions into applications using JNDI. It also supports configuration using Java EE 7 @MailSessionDefinition
and @MailSessionDefinitions
annotations.
Configuring SMTP server for use in an application
Configure the SMTP server and the outbound socket binding using the following CLI commands, for example:
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=my-smtp:add(host=localhost, port=25)
/subsystem=mail/mail-session=mySession:add(jndi-name=java:jboss/mail/MySession)
/subsystem=mail/mail-session=mySession/server=smtp:add(outbound-socket-binding-ref=my-smtp, username=user, password=pass, tls=true)
Call the configured mail session within an application
@Resource(lookup="java:jboss/mail/MySession") private Session session;
For a full list of the attributes available for configuring mail sessions and servers, see Mail Subsystem Attributes.
10.2. Configuring Custom Transports
When using a standard mail server, such as POP3 or IMAP, the mail server has a set of attributes that can be defined. Some of these attributes are mandatory. The most important of these is the outbound-socket-binding-ref
, which is a reference to the outbound mail socket binding and is defined with a host address and port number.
Defining the outbound-socket-binding-ref
may not be the most effective solution for users who have their host configuration using multiple hosts for load balancing purposes. Standard JavaMail does not support host configuration using multiple hosts for load balancing. Therefore, users who have this configuration using multiple hosts are required to implement custom mail transports. These custom mail transports do not require the outbound-socket-binding-ref
and allow custom host property formats.
You can configure custom mail transports from the management CLI.
Add a new mail session and specify the JNDI name.
/subsystem=mail/mail-session=mySession:add(jndi-name=java:jboss/mail/MySession)
Add an outbound socket binding and specify the host and port.
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=my-smtp-binding:add(host=localhost, port=25)
Add an SMTP server and specify the outbound socket binding, username, and password.
/subsystem=mail/mail-session=mySession/server=smtp:add(outbound-socket-binding-ref=my-smtp-binding, username=user, password=pass, tls=true)
You can configure a POP3 or IMAP server using similar steps.
POP3 Server
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=my-pop3-binding:add(host=localhost, port=110) /subsystem=mail/mail-session=mySession/server=pop3:add(outbound-socket-binding-ref=my-pop3-binding, username=user, password=pass)
IMAP Server
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=my-imap-binding:add(host=localhost, port=143) /subsystem=mail/mail-session=mySession/server=imap:add(outbound-socket-binding-ref=my-imap-binding, username=user, password=pass)
To use a custom server, create a custom mail server without an outbound socket binding. You can specify the host information in the properties definition of the custom mail server. For example:
/subsystem=mail/mail-session=mySession/custom=myCustomServer:add(username=user,password=pass, properties={"host" => "myhost", "my-property" =>"value"})
If you define a custom protocol, any property name that includes a period (.
) is considered a fully-qualified name and is passed directly. Any other format, such as my-property
, is translated in the following format: mail.server-name.my-property
.
The following XML is an example mail configuration that includes custom servers.
<subsystem xmlns="urn:jboss:domain:mail:2.0"> <mail-session name="default" jndi-name="java:jboss/mail/Default"> <smtp-server outbound-socket-binding-ref="mail-smtp"/> </mail-session> <mail-session name="myMail" from="user.name@domain.org" jndi-name="java:/Mail"> <smtp-server password="password" username="user" tls="true" outbound-socket-binding-ref="mail-smtp"/> <pop3-server outbound-socket-binding-ref="mail-pop3"/> <imap-server password="password" username="nobody" outbound-socket-binding-ref="mail-imap"/> </mail-session> <mail-session name="custom" jndi-name="java:jboss/mail/Custom" debug="true"> <custom-server name="smtp" password="password" username="username"> <property name="host" value="mail.example.com"/> </custom-server> </mail-session> <mail-session name="custom2" jndi-name="java:jboss/mail/Custom2" debug="true"> <custom-server name="pop3" outbound-socket-binding-ref="mail-pop3"> <property name="custom-prop" value="some-custom-prop-value"/> </custom-server> </mail-session> </subsystem>
Chapter 11. Configuring Web Services
JBoss EAP offers the ability to configure the behavior of deployed web services through the webservices
subsystem using the management console or the management CLI. You can configure published endpoint addresses and handler chains. You can also enable the collection of runtime statistics for web services.
For more information, see Configuring the Web Services Subsystem in Developing Web Services Applications for JBoss EAP.
Chapter 12. Logging with JBoss EAP
JBoss EAP provides highly-configurable logging facilities for both its own internal use and for use by deployed applications. The logging
subsystem is based on JBoss LogManager and supports several third-party application logging frameworks in addition to JBoss Logging.
12.1. About Server Logging
12.1.1. Server Logging
By default, all JBoss EAP log entries are written to the server.log
file. The location of this file depends on your operating mode.
-
Standalone server:
EAP_HOME/standalone/log/server.log
-
Managed domain:
EAP_HOME/domain/servers/SERVER_NAME/log/server.log
This file is often referred to as the server log. For more information, see the Root Logger section.
12.1.2. Bootup Logging
During bootup, JBoss EAP logs information about the Java environment and the startup of each service. This log can be useful when troubleshooting. By default, all log entries are written to the server log.
Bootup logging configuration is specified in the logging.properties
configuration file, which is active until the JBoss EAP logging
subsystem is started and takes over. The location of this file depends on your operating mode.
-
Standalone server:
EAP_HOME/standalone/configuration/logging.properties
Managed domain:
There is a
logging.properties
file for the domain controller and for each server.-
Domain controller:
EAP_HOME/domain/configuration/logging.properties
-
Server:
EAP_HOME/domain/servers/SERVER_NAME/data/logging.properties
-
Domain controller:
It is recommended that you do not directly edit the logging.properties
file unless you know of a specific use case that requires it. Before doing so, it is recommended that you open a support case from the Red Hat Customer Portal.
Changes made manually to the logging.properties
file are overwritten on startup.
12.1.2.1. View Bootup Errors
When troubleshooting JBoss EAP, checking for errors that occurred during bootup should be one of the first steps taken. You can then use the information provided to diagnose and resolve their causes. Open a support case for assistance in troubleshooting bootup errors.
There are two methods of viewing bootup errors, each with its advantages. You can examine the server.log
file or read the boot errors using the read-boot-errors
management CLI command.
Examine the Server Log File
You can open the server.log
file to view any errors that occurred during bootup.
This method allows you to see each error message together with possibly related messages, allowing you to get more information about why an error might have occurred. It also allows you to see error messages in plain text format.
-
Open the file
server.log
in a file viewer. - Navigate to the end of the file.
-
Search backward for the
WFLYSRV0049
message identifier, which marks the start of the latest bootup sequence. -
Search the log from that point onward for instances of
ERROR
. Each instance will include a description of the error and list the modules involved.
The following is an example error description from the server.log
log file.
2016-03-16 14:32:01,627 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC000001: Failed to start service jboss.undertow.listener.default: org.jboss.msc.service.StartException in service jboss.undertow.listener.default: Could not start http listener at org.wildfly.extension.undertow.ListenerService.start(ListenerService.java:142) at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.net.BindException: Address already in use ...
Read the Boot Errors from the Management CLI
You can use the read-boot-errors
management CLI command to view errors if a server starts but reported errors during bootup.
This method does not require access to the server’s file system, which is useful for anyone responsible for monitoring for errors who does not have file system access. Since it is a management CLI command, it can be used in a script. For example, you could write a script that starts multiple JBoss EAP instances, then checks for errors that occurred on bootup.
Run the following management CLI command.
/core-service=management:read-boot-errors
Any errors that occurred during bootup will be listed.
{ "outcome" => "success", "result" => [ { "failed-operation" => { "operation" => "add", "address" => [ ("subsystem" => "undertow"), ("server" => "default-server"), ("http-listener" => "default") ] }, "failure-description" => "{\"WFLYCTL0080: Failed services\" => {\"jboss.undertow.listener.default\" => \"org.jboss.msc.service.StartException in service jboss.undertow.listener.default: Could not start http listener Caused by: java.net.BindException: Address already in use\"}}", "failed-services" => {"jboss.undertow.listener.default" => "org.jboss.msc.service.StartException in service jboss.undertow.listener.default: Could not start http listener Caused by: java.net.BindException: Address already in use"} } ... ] }
12.1.3. Garbage Collection Logging
Garbage collection logging logs all garbage collection activity to plain text log files. These log files can be useful for diagnostic purposes. Garbage collection logging is enabled by default for a JBoss EAP standalone server on all supported configurations except IBM Java development kit.
The location of the garbage collection log is EAP_HOME/standalone/log/gc.log.DIGIT.current
. Garbage collection logs are limited to 3 MB each, and up to five files are rotated.
12.1.4. Default Log File Locations
The following log files are created for the default logging configurations. The default configuration writes the server log files using periodic log handlers.
Table 12.1. Default Log File for a Standalone Server
Log File | Description |
---|---|
EAP_HOME/standalone/log/server.log | Contains server log messages, including server startup messages. |
EAP_HOME/standalone/log/gc.log.DIGIT.current | Contains garbage collection details. |
Table 12.2. Default Log Files for a Managed Domain
Log File | Description |
---|---|
EAP_HOME/domain/log/host-controller.log | Contains log messages related to the startup of the host controller. |
EAP_HOME/domain/log/process-controller.log | Contains log messages related to the startup of the process controller. |
EAP_HOME/domain/servers/SERVER_NAME/log/server.log | Contains log messages for the named server, including server startup messages. |
12.1.5. Set the Default Locale of the Server
You can configure the default locale for JBoss EAP by setting JVM properties in the appropriate startup configuration file. The startup configuration file is EAP_HOME/bin/standalone.conf
for a standalone server or EAP_HOME/bin/domain.conf
for a managed domain.
For Windows Server, the JBoss EAP startup configuration files are standalone.conf.bat
and domain.conf.bat
.
Log messages that have been internationalized and localized will use this default locale. See the JBoss EAP Development Guide for information on creating internationalized log messages.
Set the Language
Specify the language by setting the user.language
property using the JAVA_OPTS
variable. For example, add the following line to the startup configuration file to set a French locale.
JAVA_OPTS="$JAVA_OPTS -Duser.language=fr"
Log messages that have been internationalized and localized will now output in French.
Set the Language and Country
In addition to the language, it may also be necessary to specify the country by setting the user.country
property. For example, add the following line to the startup configuration file to set the Portuguese locale for Brazil.
JAVA_OPTS="$JAVA_OPTS -Duser.language=pt -Duser.country=BR"
Log messages that have been internationalized and localized will now output in Brazilian Portuguese.
Set the Server Locale Using the org.jboss.logging.locale Property
You can configure the org.jboss.logging.locale
property to override the locale for messages logged using JBoss Logging, including any messages from JBoss EAP and its owned dependencies. Other dependencies, such as JSF, cannot get an overridden locale.
To start the JBoss EAP server with a different locale than the system default, you can edit EAP_HOME/bin/standalone.conf
or the EAP_HOME/bin/domain.conf
file, depending on your operating mode, and append the following command to set the JVM parameter for the required locale. The value of the property must be specified in the BCP 47 format. For example, to set Brazilian Portuguese, use pt-BR.
JAVA_OPTS="$JAVA_OPTS -Dorg.jboss.logging.locale=pt-BR"
12.2. Viewing Log Files
Viewing server and application logs is important in order to help diagnose errors, performance problems, and other issues. Some users may prefer to view logs directly on the server file system. For those who do not have direct access to the file system, or who prefer a graphical interface, JBoss EAP allows you to view logs from the management console. You can also view logs using the management CLI.
For a log to be accessible from one of the management interfaces, it must be located in the directory specified by the server’s jboss.server.log.dir
property and be defined as a file, periodic rotating, size rotating, or periodic size rotating log handler. RBAC role assignments are also honored, so a user logged in to the management console or CLI can only view logs that they are authorized to access.
View Logs from the Management Console
You can view logs directly from the management console.
- Select the Runtime tab.
- Select Standalone Server. If you are running in a managed domain, select the appropriate server.
- Select Log Files and click View.
Once you choose a log file from the list, you can view and search the log contents directly in the management console. You can also download a log file to your local file system.
The management console log viewer is not intended to be a text editor replacement for viewing very large log files, for example, greater than 100MB. You will be prompted for confirmation if you attempt to open a log file that is larger than 15MB. Opening a very large file in the management console could crash your browser, so you should always download large log files locally and open them in a text editor.
View Logs from the Management CLI
You can read the contents of log files from the management CLI using the read-log-file
command. By default, this displays the last 10
lines of the specified log file.
/subsystem=logging/log-file=LOG_FILE_NAME:read-log-file
In a managed domain, precede this command with /host=HOST_NAME/server=SERVER_NAME
.
You can use the following parameters to customize the log output.
- encoding
- The character encoding used to read the file.
- lines
-
The number of lines to read from the file. A value of
-1
will read all log lines. The default is10
. - skip
-
The number of lines to skip before reading. The default is
0
. - tail
-
Whether to read from the end of the file. Defaults to
true
.
For example, the following management CLI command reads the first 5
lines from the top of the server.log
log file.
/subsystem=logging/log-file=server.log:read-log-file(lines=5,tail=false)
This produces the following output.
{ "outcome" => "success", "result" => [ "2016-03-24 08:49:26,612 INFO [org.jboss.modules] (main) JBoss Modules version 1.5.1.Final-redhat-1", "2016-03-24 08:49:26,788 INFO [org.jboss.msc] (main) JBoss MSC version 1.2.6.Final-redhat-1", "2016-03-24 08:49:26,863 INFO [org.jboss.as] (MSC service thread 1-7) WFLYSRV0049: JBoss EAP 7.0.0.GA (WildFly Core 2.0.13.Final-redhat-1) starting", "2016-03-24 08:49:27,973 INFO [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0039: Creating http management service using socket-binding (management-http)", "2016-03-24 08:49:27,994 INFO [org.xnio] (MSC service thread 1-1) XNIO version 3.3.4.Final-redhat-1" ] }
12.3. About the Logging Subsystem
The JBoss EAP logging
subsystem is configured using a system of log categories and log handlers. Log categories define what messages to capture. Log handlers define how to deal with those messages, for example, writing to a disk or sending to the console.
Logging profiles allow uniquely-named sets of logging configuration to be created and assigned to applications independent of any other logging configuration. The configuration of logging profiles is almost identical to the main logging
subsystem.
12.3.1. Root Logger
The JBoss EAP root logger captures all log messages, of the specified log level or higher, sent to the server that are not captured by a log category.
By default, the root logger is configured to use a console and a periodic log handler. The periodic log handler is configured to write to the server.log
file. This file is often referred to as the server log.
See Configuring the Root Logger for more information.
12.3.2. Log Categories
A log category defines a set of log messages to capture and one or more log handlers that will process the messages.
The log messages to capture are defined by the specified Java package of origin and log level. Messages from classes in that package and of that log level or higher are captured by the log category and sent to the specified log handlers.
Although the log category is typically the Java package and class name, it can be any name specified by the Logger.getLogger(LOGGER_NAME)
method.
Log categories can optionally use the log handlers of the root logger instead of their own handlers.
See Configuring Log Categories for more information.
12.3.3. Log Handlers
Log handlers define how captured log messages are recorded. The available log handler types are console, file, periodic, size, periodic size, syslog, custom, and async.
A log handler must be added to at least one logger in order to be active.
Log Handler Types
- Console
-
A console log handler writes log messages to either the host operating system’s standard out (
stdout
) or standard error (stderr
) stream. These messages are displayed when JBoss EAP is run from a command line prompt. The messages from a console log handler are not saved unless the operating system is configured to capture the standard out or standard error stream. - File
- A file log handler writes log messages to a specified file.
- Periodic
- A periodic log handler writes log messages to a named file until a specified period of time has elapsed. Once the time period has passed, the file is renamed by appending the specified timestamp and the handler continues to write into a newly created log file with the original name.
- Size
- A size log handler writes log messages to a named file until the file reaches a specified size. When the file reaches a specified size, it is renamed with a numeric suffix and the handler continues to write into a newly created log file with the original name. Each size log handler must specify the maximum number of files to be kept in this fashion.
- Periodic Size
A periodic size log handler writes log messages to a named file until the file reaches the specified size or the specified time period has passed. Then, the file is renamed and the handler continues to write to a newly created log file with the original name.
This is a combination of the periodic and size log handlers and supports their combined attributes.
- Syslog
- A syslog handler can be used to send messages to a remote logging server. This allows multiple applications to send their log messages to the same server, where they can all be parsed together.
- Custom
-
A custom log handler enables you to configure new types of log handlers that have been implemented. A custom handler must be implemented as a Java class that extends
java.util.logging.Handler
and be contained in a module. You can also use a Log4J appender as a custom log handler. - Async
- An async log handler is a wrapper log handler that provides asynchronous behavior for one or more other log handlers. This is useful for log handlers that may have high latency or other performance problems such as writing a log file to a network file system.
For details on configuring each of these log handlers, see the Configuring Log Handlers section.
12.3.4. Log Levels
A log level is an enumerated value that indicates the nature and severity of a log message. As a developer, you can specify the level of a given log message using the appropriate method of your chosen logging framework to send the message.
JBoss EAP supports all the log levels used by the supported application logging frameworks. The most commonly used log levels from lowest to highest are TRACE
, DEBUG
, INFO
, WARN
, ERROR
, and FATAL
.
Log levels are used by log categories and handlers to limit the messages they are responsible for. Each log level has an assigned numeric value that indicates its order relative to other log levels. Log categories and handlers are assigned a log level, and they only process log messages of that level or higher. For example a log handler with the level of WARN
will only record messages of the levels WARN
, ERROR
, and FATAL
.
Supported Log Levels
Log Level | Value | Description |
---|---|---|
ALL | Integer.MIN_VALUE | Provides all log messages. |
FINEST | 300 | - |
FINER | 400 | - |
TRACE | 400 |
|
DEBUG | 500 |
|
FINE | 500 | - |
CONFIG | 700 | - |
INFO | 800 |
|
WARN | 900 |
|
WARNING | 900 | - |
ERROR | 1000 |
|
SEVERE | 1000 | - |
FATAL | 1100 |
|
OFF | Integer.MAX_VALUE | Does not display any log message. |
ALL
is the lowest log level and includes messages of all log levels. This provides the most amount of logging.
FATAL
is the highest log level and only includes messages of that level. This provides the least amount of logging.
12.3.5. Log Formatters
A log formatter defines the appearance of log messages from that handler. It is a string that uses a syntax based on java.util.logging.Formatter
class.
For example, the default configuration uses the following log formatter string for logging messages to the server log: %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. This will create log messages like the one shown below.
2016-03-18 15:49:32,075 INFO [org.jboss.as] (Controller Boot Thread) WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
For more information on configuring log formatters, see Configure a Named Pattern Formatter or Configure a Custom Log Formatter.
See the table below for the syntax used in log formatter strings.
Log Formatter Syntax
Symbol | Description |
---|---|
%c | The category of the logging event. |
%p | The level of the log entry (INFO, DEBUG, etc.). |
%P | The localized level of the log entry. |
%d |
The current date/time ( |
%r | The relative time (milliseconds since the log was initialized). |
%z |
The time zone, which must be specified before the date ( |
%k | A log resource key (used for localization of log messages). |
%m | The log message (including exception trace). |
%s | The simple log message (no exception trace). |
%e | The exception stack trace (no extended module information). |
%E | The exception stack trace (with extended module information). |
%t | The name of the current thread. |
%n | A newline character. |
%C | The class of the code calling the log method (slow). |
%F | The filename of the class calling the log method (slow). |
%l | The source location of the code calling the log method (slow). |
%L | The line number of the code calling the log method (slow). |
%M | The method of the code calling the log method (slow). |
%x | The Nested Diagnostic Context. |
%X | The Message Diagnostic Context. |
%% |
A literal percent ( |
12.3.6. Filter Expressions
Filter expressions, configured using the filter-spec
attribute, are used to record log messages based on various criteria. Filter checking is always done on a raw unformatted message. You can include a filter for a logger or handler, but the logger filter takes precedence over the filter put on a handler.
A filter-spec
specified for the root logger is not inherited by other loggers. Instead a filter-spec
must be specified per handler.
Table 12.3. Filter Expressions for Logging
Filter Expression | Description |
---|---|
accept | Accept all log messages. |
deny | Deny all log messages. |
not[filter expression] | Returns the inverted value of a single filter expression. For example:
|
all[filter expression] | Returns concatenated value from a comma-separated list of filter expressions. For example:
|
any[filter expression] | Returns one value from a comma-separated list of filter expressions. For example:
|
levelChange[level] | Updates the log record with the specified level. For example:
|
levels[levels] | Filters log messages with a level listed in the comma-separated list of levels. For example:
|
levelRange[minLevel,maxLevel] |
Filters log messages within the specified level range. The
|
match["pattern"] | Filters log messages using the provided regular expression. For example:
|
substitute["pattern","replacement value"] | A filter that replaces the first match to the pattern (first argument) with the replacement text (second argument). For example:
|
substituteAll["pattern","replacement value"] | A filter which replaces all matches of the pattern (first argument) with the replacement text (second argument). For example:
|
When configuring the filter expression using the management CLI, be sure to escape commas and quotation marks in the filter text so that the value is correctly processed as a string. You must precede commas and quotation marks with a backslash (\
) and wrap the entire expression in quotation marks. Below is an example that properly escapes substituteAll("WFLY","YLFW")
.
/subsystem=logging/console-handler=CONSOLE:write-attribute(name=filter-spec, value="substituteAll(\"WFLY\"\,\"YLFW\")")
12.3.7. Implicit Logging Dependencies
By default, the JBoss EAP logging
subsystem adds implicit logging API dependencies to deployments. You can control whether these implicit dependencies are added to deployments by using the add-logging-api-dependencies
attribute, which is true
by default.
Using the management CLI, you can set the add-logging-api-dependencies
attribute to false
so that the implicit logging API dependencies will not be added to deployments.
/subsystem=logging:write-attribute(name=add-logging-api-dependencies, value=false)
For information on the implicit dependencies for the logging
subsystem, see the Implicit Module Dependencies section in the JBoss EAP Development Guide.
12.4. Configuring Log Categories
This section shows you how to configure log categories using the management CLI. You can also configure log categories using the management console by navigating to the Logging subsystem from the Configuration tab and selecting the Log Categories tab.
The main tasks you will perform to configure a log category are:
If you are configuring this log category for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Log Category
The log category name is defined by the Java package of origin. Messages from classes in that package will be captured as long as they adhere to the other settings, for example, the log level.
/subsystem=logging/logger=LOG_CATEGORY:add
Configure Log Category Settings
Depending on your needs, you may need to set one or more of the following log category attributes. For a full list of available log category attributes and their descriptions, see Log Category Attributes.
Set the log level.
Set the appropriate log level for the log category. The default is
ALL
. See Log Levels for all available options./subsystem=logging/logger=LOG_CATEGORY:write-attribute(name=level,value=LEVEL)
Set whether this category should use the log handlers of the root logger.
By default, log categories will use the handlers of the root logger in addition to its own. Set the
use-parent-handlers
attribute tofalse
if the log category should use only its assigned handlers./subsystem=logging/logger=LOG_CATEGORY:write-attribute(name=use-parent-handlers,value=USE_PARENT_HANDLERS)
Set the filter expression.
Set the expression for filtering log messages for the log category. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/logger=LOG_CATEGORY:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign a Handler
Assign a log handler to the log category.
/subsystem=logging/logger=LOG_CATEGORY:add-handler(name=LOG_HANDLER_NAME)
Remove a Log Category
A log category can be removed with the remove
operation.
/subsystem=logging/logger=LOG_CATEGORY:remove
12.5. Configuring Log Handlers
Log handlers define how captured log messages are recorded. See the appropriate section for configuring the type of log handler that you need.
12.5.1. Configure a Console Log Handler
This section shows you how to configure a console log handler using the management CLI. You can also configure console log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Console from the left-hand menu.
The main tasks you will perform to configure a console log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Console Log Handler
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:add
Configure Console Log Handler Settings
Depending on your needs, you may need to set one or more of the following console log handler attributes. For a full list of available console log handler attributes and their descriptions, see Console Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the target.
Set the target for the handler, which can be one of
System.out
,System.err
, orconsole
. The default isSystem.out
./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=target,value=TARGET)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set auto flush.
Set whether to automatically flush after each write. The default value is
true
./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Console Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the console log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=CONSOLE_HANDLER_NAME)
The following management CLI command assigns the console log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=CONSOLE_HANDLER_NAME)
Remove a Console Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:remove
12.5.2. Configure a File Log Handler
This section shows you how to configure a file log handler using the management CLI. You can also configure file log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting File from the left-hand menu.
The main tasks you will perform to configure a file log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a File Log Handler
When adding a file log handler, you must specify the file path using the file
attribute, which is comprised of the path
and relative-to
attributes. Use the path
attribute to set the file path for the log, including the name, for example my-log.log
. Optionally, use the relative-to
attribute to set that the path
is relative to a named path, for example jboss.server.log.dir
.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:add(file={path=FILE_PATH,relative-to=RELATIVE_TO_PATH})
Configure File Log Handler Settings
Depending on your needs, you may need to set one or more of the following file log handler attributes. For a full list of available file log handler attributes and their descriptions, see File Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted. You can set the
append
attribute tofalse
to have the file overwritten upon server restart./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set auto flush.
Set whether to automatically flush after each write. The default value is
true
./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/file-handler=FILE_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the File Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the file log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=FILE_HANDLER_NAME)
The following management CLI command assigns the file log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=FILE_HANDLER_NAME)
Remove a File Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:remove
12.5.3. Configure a Periodic Rotating Log Handler
This section shows you how to configure a periodic rotating log handler using the management CLI. You can also configure periodic log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Periodic from the left-hand menu.
The main tasks you will perform to configure a periodic log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Periodic Log Handler
When adding a periodic log handler, you must specify the file path using the file
attribute, which is comprised of the path
and relative-to
attributes. Use the path
attribute to set the file path for the log, including the name, for example my-log.log
. Optionally, use the relative-to
attribute to set that the path
is relative to a named path, for example jboss.server.log.dir
.
You must also set the suffix for rotated logs using the suffix
attribute. This must be in a format that can be understood by java.text.SimpleDateFormat
, for example .yyyy-MM-dd-HH
. The period of the rotation is automatically calculated based on this suffix.
/subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:add(file={path=FILE_PATH,relative-to=RELATIVE_TO_PATH},suffix=SUFFIX)
Configure Periodic Log Handler Settings
Depending on your needs, you may need to set one or more of the following periodic log handler attributes. For a full list of available periodic log handler attributes and their descriptions, see Periodic Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted. You can set the
append
attribute tofalse
to have the file overwritten upon server restart./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set auto flush.
Set whether to automatically flush after each write. The default value is
true
./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Periodic Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the periodic log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=PERIODIC_HANDLER_NAME)
The following management CLI command assigns the periodic log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=PERIODIC_HANDLER_NAME)
Remove a Periodic Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/periodic-rotating-file-handler=PERIODIC_HANDLER_NAME:remove
12.5.4. Configure a Size Rotating Log Handler
This section shows you how to configure a size rotating log handler using the management CLI. You can also configure size log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Size from the left-hand menu.
The main tasks you will perform to configure a size log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Size Log Handler
When adding a size log handler, you must specify the file path using the file
attribute, which is comprised of the path
and relative-to
attributes. Use the path
attribute to set the file path for the log, including the name, for example my-log.log
. Optionally, use the relative-to
attribute to set that the path
is relative to a named path, for example jboss.server.log.dir
.
/subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:add(file={path=FILE_PATH,relative-to=RELATIVE_TO_PATH})
Configure Size Log Handler Settings
Depending on your needs, you may need to set one or more of the following size log handler attributes. For a full list of available size log handler attributes and their descriptions, see Size Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the suffix for rotated logs.
Set the suffix string, which is in a format which can be understood by
java.text.SimpleDateFormat
, for example.yyyy-MM-dd-HH
. The period of the rotation is automatically calculated based on this suffix./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=suffix, value=SUFFIX)
Set the rotation size.
Set the maximum size that the file can reach before being rotated. The default is
2m
for 2 megabytes./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=rotate-size, value=ROTATE_SIZE)
Set the maximum number of backup logs to keep.
Set the number of backups to keep. The default is
1
./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=max-backup-index, value=MAX_BACKUPS)
Set whether to rotate the log on boot.
By default, a new log file is not created on server restart. You can set this to
true
to rotate the log on server restart./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=rotate-on-boot, value=ROTATE_ON_BOOT)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted. You can set the
append
attribute tofalse
to have the file overwritten upon server restart./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set auto flush.
Set whether to automatically flush after each write. The default value is
true
./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Size Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the size log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=SIZE_HANDLER_NAME)
The following management CLI command assigns the size log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=SIZE_HANDLER_NAME)
Remove a Size Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:remove
12.5.5. Configure a Periodic Size Rotating Log Handler
This section shows you how to configure a periodic size rotating log handler using the management CLI. You can also configure periodic size log handlers using the management console by navigating to the Logging subsystem, selecting the Handler tab, and selecting Periodic Size from the left-hand menu.
The main tasks you will perform to configure a periodic size log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Periodic Size Log Handler
When adding a periodic size log handler, you must specify the file path using the file
attribute, which is comprised of the path
and relative-to
attributes. Use the path
attribute to set the file path for the log, including the name, for example my-log.log
. Optionally, use the relative-to
attribute to set that the path
is relative to a named path, for example jboss.server.log.dir
.
You must also set the suffix for rotated logs using the suffix
attribute. This must be in a format that can be understood by java.text.SimpleDateFormat
, for example .yyyy-MM-dd-HH
. The period of the rotation is automatically calculated based on this suffix.
/subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:add(file={path=FILE_PATH,relative-to=RELATIVE_TO_PATH},suffix=SUFFIX)
Configure Periodic Size Log Handler Settings
Depending on your needs, you may need to set one or more of the following periodic size log handler attributes. For a full list of available periodic size log handler attributes and their descriptions, see Periodic Size Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the rotation size.
Set the maximum size that the file can reach before being rotated. The default is
2m
for 2 megabytes./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=rotate-size, value=ROTATE_SIZE)
Set the maximum number of backup logs to keep.
Set the number of backups to keep. The default is
1
./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=max-backup-index, value=MAX_BACKUPS)
Set whether to rotate the log on boot.
By default, a new log file is not created on server restart. You can set this to
true
to rotate the log on server restart./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=rotate-on-boot, value=ROTATE_ON_BOOT)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted. You can set the
append
attribute tofalse
to have the file overwritten upon server restart./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set auto flush.
Set whether to automatically flush after each write. The default value is
true
./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Periodic Size Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the periodic size log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=PERIODIC_SIZE_HANDLER_NAME)
The following management CLI command assigns the periodic size log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=PERIODIC_SIZE_HANDLER_NAME)
Remove a Periodic Size Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/periodic-size-rotating-file-handler=PERIODIC_SIZE_HANDLER_NAME:remove
12.5.6. Configure a Syslog Handler
This section shows you how to configure a syslog handler using the management CLI, which can be used to send messages to a remote logging server that supports the Syslog protocol (RFC-3164 or RFC-5424). You can also configure syslog handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Syslog from the left-hand menu.
The main tasks you will perform to configure a syslog handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Syslog Handler
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:add
Configure Syslog Handler Settings
Depending on your needs, you may need to set one or more of the following syslog handler attributes. For a full list of available syslog handler attributes and their descriptions, see Syslog Handler Attributes.
Set the log level for the handler. The default level is
ALL
. See Log Levels for all available options./subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the name of the application that is logging. The default name is
java
./subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:write-attribute(name=app-name,value=APP_NAME)
Set the address of the syslog server. The default address is
localhost
./subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:write-attribute(name=server-address,value=SERVER_ADDRESS)
Set the port of the syslog server. The default port is
514
./subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:write-attribute(name=port,value=PORT)
Set the syslog format, as defined by an RFC specification. The default format is
RFC5424
./subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:write-attribute(name=syslog-format,value=SYSLOG_FORMAT)
Assign the Syslog Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the syslog handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=SYSLOG_HANDLER_NAME)
The following management CLI command assigns the syslog handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=SYSLOG_HANDLER_NAME)
Remove a Syslog Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:remove
12.5.7. Configure a Custom Log Handler
This section shows you how to configure a custom log handler using the management CLI. You can also configure custom log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Custom from the left-hand menu.
The main tasks you will perform to configure a custom log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add a Custom Log Handler
When adding a custom log handler, you must specify the Java class of the handler and the JBoss EAP module in which it is contained. The class must extend java.util.logging.Handler
.
You must have already created a module containing the custom logger or this command will fail.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:add(class=CLASS_NAME,module=MODULE_NAME)
Configure Custom Log Handler Settings
Depending on your needs, you may need to set one or more of the following custom log handler attributes. For a full list of available custom log handler attributes and their descriptions, see Custom Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the properties.
Set the necessary properties for the log handler. The properties must be accessible using a setter method.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:write-attribute(name=properties.PROPERTY_NAME,value=PROPERTY_VALUE)
Set the encoding.
Set the encoding for the handler, for example,
utf-8
./subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:write-attribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n
. Be sure to enclose theFORMAT
value in quotation marks./subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:write-attribute(name=formatter,value=FORMAT)
NoteUse the
named-formatter
attribute if you want to reference a saved formatter.Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Custom Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the custom log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=CUSTOM_HANDLER_NAME)
The following management CLI command assigns the custom log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=CUSTOM_HANDLER_NAME)
Remove a Custom Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger or async log handler.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:remove
12.5.8. Configure an Async Log Handler
This section shows you how to configure an async log handler using the management CLI. You can also configure async log handlers using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Async from the left-hand menu.
The main tasks you will perform to configure an async log handler are:
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add an Async Log Handler
When adding an async log handler, you must specify the queue length. This is the maximum number of log requests that can be held in queue.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:add(queue-length=QUEUE_LENGTH)
Add a Sub-handler
You can add one or more handlers as sub-handlers for this async log handler. Note that the handlers must already exist in the configuration or this command will fail.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:add-handler(name=HANDLER_NAME)
Configure Async Log Handler Settings
Depending on your needs, you may need to set one or more of the following async log handler attributes. For a full list of available async log handler attributes and their descriptions, see Async Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is
ALL
. See Log Levels for all available options./subsystem=logging/async-handler=ASYNC_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the overflow action.
Set the action to take when overflowing. The default value is
BLOCK
, which means that threads will block in the event of a full queue. You can change this value toDISCARD
, which means that log messages will be discarded in the event of a full queue./subsystem=logging/async-handler=ASYNC_HANDLER_NAME:write-attribute(name=overflow-action,value=OVERFLOW_ACTION)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION
replaceable variable below would need to be replaced with"not(match(\"WFLY\"))"
for a filter expression ofnot(match("WFLY"))
./subsystem=logging/async-handler=ASYNC_HANDLER_NAME:write-attribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Async Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the async log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=ASYNC_HANDLER_NAME)
The following management CLI command assigns the async log handler to a logger whose name is specified by CATEGORY
.
/subsystem=logging/logger=CATEGORY:add-handler(name=ASYNC_HANDLER_NAME)
Remove an Async Log Handler
A log handler can be removed with the remove
operation. A log handler cannot be removed if it is currently assigned to a logger.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:remove
12.6. Configuring the Root Logger
The root logger captures all log messages, of the specified log level or higher, sent to the server that are not captured by a log category.
This section shows you how to configure the root logger using the management CLI. You can also configure the root logger using the management console by navigating to the Logging subsystem from the Configuration tab and selecting the Root Logger tab.
Configure the Root Logger
If you are configuring this log handler for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Assign log handlers to the root logger.
Add a log handler.
/subsystem=logging/root-logger=ROOT:add-handler(name=LOG_HANDLER_NAME)
Remove a log handler.
/subsystem=logging/root-logger=ROOT:remove-handler(name=LOG_HANDLER_NAME)
Set the log level.
/subsystem=logging/root-logger=ROOT:write-attribute(name=level,value=LEVEL)
For a full list of available root logger attributes and their descriptions, see Root Logger Attributes.
12.7. Configuring Log Formatters
A log formatter defines the appearance of log messages from that handler. You can configure a named pattern formatter or a custom log formatter.
12.7.1. Configure a Named Pattern Formatter
You can create a named pattern formatter that can be used across log handlers to format log messages.
This section shows you how to configure a log formatter using the management CLI. You can also configure log formatters using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Formatter tab, and selecting Pattern from the left-hand menu.
If you are configuring this log formatter for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Create a Named Formatter
When defining a formatter, you provide a pattern string to use to format log messages. See log formatters for more information on the pattern syntax.
/subsystem=logging/pattern-formatter=PATTERN_FORMATTER_NAME:add(pattern=PATTERN_STRING)
You can also define a color map to assign a color to different log levels. The format is a comma-separated list of LEVEL:COLOR
.
-
Valid levels:
finest
,finer
,fine
,config
,trace
,debug
,info
,warning
,warn
,error
,fatal
,severe
-
Valid colors:
black
,green
,red
,yellow
,blue
,magenta
,cyan
,white
,brightblack
,brightred
,brightgreen
,brightblue
,brightyellow
,brightmagenta
,brightcyan
,brightwhite
/subsystem=logging/pattern-formatter=PATTERN_FORMATTER_NAME:write-attribute(name=color-map,value="LEVEL:COLOR,LEVEL:COLOR")
Assign a Named Formatter to a Log Handler
The following management CLI command assigns a pattern formatter to be used by a periodic rotating file handler.
/subsystem=logging/periodic-rotating-file-handler=FILE_HANDLER_NAME:write-attribute(name=named-formatter,value=PATTERN_FORMATTER_NAME)
12.7.2. Configure a Custom Log Formatter
You can create a custom log formatter that can be used across log handlers to format log messages.
This section shows you how to configure a custom log formatter using the management CLI. You can also configure log formatters using the management console by navigating to the Logging subsystem from the Configuration tab, selecting the Formatter tab, and selecting Custom from the left-hand menu.
Configure a Custom Log Formatter
If you are configuring this log formatter for a logging profile, the start of the command would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/
.
Additionally, if you are running in a managed domain, precede the commands with /profile=PROFILE_NAME
.
Add the custom log formatter.
When adding a custom log formatter, you must specify the Java class of the formatter and the JBoss EAP module in which it is contained. The class must extend
java.util.logging.Formatter
.NoteYou must have already created a module containing the custom formatter or this command will fail.
/subsystem=logging/custom-formatter=CUSTOM_FORMATTER_NAME:add(class=CLASS_NAME, module=MODULE_NAME)
Set the necessary properties for the log formatter.
The properties must be accessible using a setter method.
/subsystem=logging/custom-formatter=CUSTOM_FORMATTER_NAME:write-attribute(name=properties.PROPERTY_NAME,value=PROPERTY_VALUE)
Assign the custom formatter to a log handler.
The following management CLI command assigns a custom formatter to be used by a periodic rotating file handler.
/subsystem=logging/periodic-rotating-file-handler=FILE_HANDLER_NAME:write-attribute(name=named-formatter, value=CUSTOM_FORMATTER_NAME)
Example Custom XML Formatter
The following example configures a custom XML formatter. It uses the java.util.logging.XMLFormatter
class provided in the org.jboss.logmanager
module and assigns it to the console log handler.
/subsystem=logging/custom-formatter=custom-xml-formatter:add(class=java.util.logging.XMLFormatter, module=org.jboss.logmanager) /subsystem=logging/console-handler=CONSOLE:write-attribute(name=named-formatter, value=custom-xml-formatter)
A log message using this formatter would be formatted as below.
<record> <date>2016-03-23T12:58:13</date> <millis>1458752293091</millis> <sequence>93963</sequence> <logger>org.jboss.as</logger> <level>INFO</level> <class>org.jboss.as.server.BootstrapListener</class> <method>logAdminConsole</method> <thread>22</thread> <message>WFLYSRV0051: Admin console listening on http://%s:%d</message> <param>127.0.0.1</param> <param>9990</param> </record>
12.8. About Application Logging
Logging for applications can be configured using the JBoss EAP logging
subsystem or on a per-deployment basis.
See About the Logging Subsystem for using JBoss EAP log categories and handlers for capturing log messages.
For more information on application logging, such as supported application logging frameworks and configuring per-deployment logging, see the Logging chapter in the JBoss EAP Development Guide.
12.8.1. Per-deployment Logging
Per-deployment logging allows a developer to configure the logging configuration for their application in advance. When the application is deployed, logging begins according to the defined configuration. The log files created through this configuration contain information only about the behavior of the application.
If the per-deployment logging configuration is not done, the configuration from logging
subsystem is used for all the applications as well as the server.
This approach has advantages and disadvantages over using system-wide logging. An advantage is that the administrator of the JBoss EAP instance does not need to configure any other logging than the server logging. A disadvantage is that the per-deployment logging configuration is read only on server startup, and so cannot be changed at runtime.
For instructions on using per-deployment logging in your applications, see Add Per-deployment Logging to an Application in the JBoss EAP Development Guide.
12.8.1.1. Disable Per-deployment Logging
You can disable per-deployment logging in one of the following ways:
Set the
use-deployment-logging-config
attribute tofalse
.The
use-deployment-logging-config
attribute controls whether or not your deployment is scanned for per-deployment logging. This defaults totrue
by default. You can set this attribute tofalse
to disable per-deployment logging./subsystem=logging:write-attribute(name=use-deployment-logging-config,value=false)
Exclude the
logging
subsystem using ajboss-deployment-structure.xml
file.For instructions, see Exclude a Subsystem from a Deployment in the JBoss EAP Development Guide.
12.8.2. Logging Profiles
Logging profiles are independent sets of logging configurations that can be assigned to deployed applications. As with the regular logging
subsystem, a logging profile can define handlers, categories, and a root logger, but it cannot refer to configurations in other profiles or the main logging
subsystem. The design of logging profiles mimics the logging
subsystem for ease of configuration.
Logging profiles allow administrators to create logging configurations that are specific to one or more applications without affecting any other logging configurations. Because each profile is defined in the server configuration, the logging configuration can be changed without requiring that the affected applications be redeployed. However, logging profiles cannot be configured using the management console.
Each logging profile can have:
- A unique name (required)
- Any number of log handlers
- Any number of log categories
- Up to one root logger
An application can specify a logging profile to use in its MANIFEST.MF
file, using the Logging-Profile
attribute.
12.8.2.1. Configure a Logging Profile
A logging profile can be configured with log handlers, categories, and a root logger. Configuring a logging profile uses the same syntax as configuring the logging
subsystem, except for the following differences:
-
The root configuration path is
/subsystem=logging/logging-profile=NAME
. - A logging profile cannot contain other logging profiles.
The
logging
subsystem has the following attributes that are not available for a logging profile:-
add-logging-api-dependencies
-
use-deployment-logging-config
-
Creating and Configuring a Logging Profile
The following procedure uses the management CLI to create a logging profile and set a file handler and logger category.
Create the logging profile.
/subsystem=logging/logging-profile=PROFILE_NAME:add
Create the file handler.
/subsystem=logging/logging-profile=PROFILE_NAME/file-handler=FILE_HANDLER_NAME:add(file={path=>"LOG_NAME.log", "relative-to"=>"jboss.server.log.dir"})
/subsystem=logging/logging-profile=PROFILE_NAME/file-handler=FILE_HANDLER_NAME:write-attribute(name="level", value="DEBUG")
See File Log Handler Attributes for the list of file handler attributes.
Create the logger category.
/subsystem=logging/logging-profile=PROFILE_NAME/logger=CATEGORY_NAME:add(level=TRACE)
See Log Category Attributes for the list of log category attributes.
Assign the file handler to the category.
/subsystem=logging/logging-profile=PROFILE_NAME/logger=CATEGORY_NAME:add-handler(name="FILE_HANDLER_NAME")
You can then set the logging profile to use by an application in its MANIFEST.MF
file. For more information, see Specify a Logging Profile in an Application in the JBoss EAP Development Guide.
12.8.2.2. Example Logging Profile Configuration
This example shows the configuration of a logging profile and the application that uses it. It shows the management CLI commands, the resulting XML, and the application’s MANIFEST.MF
file.
The example logging profile has the following characteristics:
-
The name is
accounts-app-profile
. -
The log category is
com.company.accounts.ejbs
. -
The log level
TRACE
. -
The log handler is a file handler using the file
ejb-trace.log
.
Management CLI Session
/subsystem=logging/logging-profile=accounts-app-profile:add /subsystem=logging/logging-profile=accounts-app-profile/file-handler=ejb-trace-file:add(file={path=>"ejb-trace.log", "relative-to"=>"jboss.server.log.dir"}) /subsystem=logging/logging-profile=accounts-app-profile/file-handler=ejb-trace-file:write-attribute(name="level", value="DEBUG") /subsystem=logging/logging-profile=accounts-app-profile/logger=com.company.accounts.ejbs:add(level=TRACE) /subsystem=logging/logging-profile=accounts-app-profile/logger=com.company.accounts.ejbs:add-handler(name="ejb-trace-file")
XML Configuration
<logging-profiles> <logging-profile name="accounts-app-profile"> <file-handler name="ejb-trace-file"> <level name="DEBUG"/> <file relative-to="jboss.server.log.dir" path="ejb-trace.log"/> </file-handler> <logger category="com.company.accounts.ejbs"> <level name="TRACE"/> <handlers> <handler name="ejb-trace-file"/> </handlers> </logger> </logging-profile> </logging-profiles>
Application MANIFEST.MF file
Manifest-Version: 1.0 Logging-Profile: accounts-app-profile
12.8.3. Viewing Deployment Logging Configuration
You can obtain information about the logging configuration for a particular deployment using the following management CLI command.
/deployment=DEPLOYMENT_NAME/subsystem=logging/configuration=CONFIG:read-resource
The logging configuration value (CONFIG
) for a deployment can be one of three values:
-
default
, if the deployment is using thelogging
subsystem. This will output thelogging
subsystem configuration. -
profile-PROFILE_NAME
, if the deployment is using a logging profile defined in thelogging
subsystem. This will output the logging profile configuration. -
The path to the configuration file being used, for example,
myear.ear/META-INF/logging.properties
.
For example, the below management CLI command displays the configuration for the MYPROFILE
logging profile, which is used by the specified deployment.
/deployment=mydeployment.war/subsystem=logging/configuration=profile-MYPROFILE:read-resource(recursive=true,include-runtime=true)
This will output the following information.
{ "outcome" => "success", "result" => { "error-manager" => undefined, "filter" => undefined, "formatter" => { "MYFORMATTER" => { "class-name" => "org.jboss.logmanager.formatters.PatternFormatter", "module" => undefined, "properties" => {"pattern" => "%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n"} } }, "handler" => { "MYPERIODIC" => { "class-name" => "org.jboss.logmanager.handlers.PeriodicRotatingFileHandler", "encoding" => undefined, "error-manager" => undefined, "filter" => undefined, "formatter" => "MYFORMATTER", "handlers" => [], "level" => "ALL", "module" => undefined, "properties" => { "append" => "true", "autoFlush" => "true", "enabled" => "true", "suffix" => ".yyyy-MM-dd", "fileName" => "EAP_HOME/standalone/log/deployment.log" } } }, "logger" => {"MYCATEGORY" => { "filter" => undefined, "handlers" => [], "level" => "DEBUG", "use-parent-handlers" => true }}, "pojo" => undefined } }
You could also use a recursive read-resource
operation to read the logging configuration and other information about a deployment.
/deployment=DEPLOYMENT_NAME/subsystem=logging:read-resource(include-runtime=true, recursive=true)
Chapter 13. Datasource Management
13.1. About JBoss EAP Datasources
About JDBC
The JDBC API is the standard that defines how databases are accessed by Java applications. An application configures a datasource that references a JDBC driver. Application code can then be written against the driver, rather than the database. The driver converts the code to the database language. This means that if the correct driver is installed, an application can be used with any supported database.
For more information, see the JDBC 4.0 specification.
Supported Databases
See JBoss EAP supported configurations for the list of JDBC-compliant databases supported by JBoss EAP 7.
Datasource Types
The two general types of resources are referred to as datasources and XA datasources.
- Non-XA datasources
- Used for applications that do not use transactions, or applications that use transactions with a single database.
- XA datasources
- Used by applications that use multiple databases or other XA resources as part of one XA transaction. XA datasources introduce additional overhead.
You specify which type of datasource to use when creating the datasource using the JBoss EAP management interfaces.
The ExampleDS datasource
JBoss EAP ships with an example datasource configuration (ExampleDS), which is provided to demonstrate how datasources are defined. This datasource uses an H2 database, which is a lightweight, relational database management system that provides developers with the ability to quickly build applications.
The ExampleDS datasource and the H2 database should not be used in a production environment. This is a very small, self-contained datasource that supports all of the standards needed for testing and building applications, but is not robust or scalable enough for production use.
13.2. JDBC Drivers
Before defining datasources in JBoss EAP for your applications to use, you must first install the appropriate JDBC driver.
13.2.1. Install a JDBC Driver as a Core Module
JDBC drivers can be installed as a core module using the management CLI using the following steps.
Download the JDBC driver.
Download the appropriate JDBC driver from your database vendor. See JDBC Driver Download Locations for standard download locations for JDBC drivers of common databases.
Make sure to extract the archive if the JDBC driver JAR file is contained within a ZIP or TAR archive.
- Start the JBoss EAP server.
Launch the management CLI, but do not use the
--connect
or-c
argument to connect to the running instance.$ EAP_HOME/bin/jboss-cli.sh
Use the
module add
management CLI command to add the new core module.module add --name=MODULE_NAME --resources=PATH_TO_JDBC_JAR --dependencies=DEPENDENCIES
For example, the following command adds a MySQL JDBC driver module.
module add --name=com.mysql --resources=/path/to/mysql-connector-java-5.1.36-bin.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Execute
module --help
for more details on using this command to add and remove modules.Use the
connect
management CLI command to connect to the running instance.connect
Register the JDBC driver. When running in a managed domain, be sure to precede this command with
/profile=PROFILE_NAME
./subsystem=datasources/jdbc-driver=DRIVER_NAME:add(driver-name=DRIVER_NAME,driver-module-name=MODULE_NAME,driver-xa-datasource-class-name=XA_DATASOURCE_CLASS_NAME, driver-class-name=DRIVER_CLASS_NAME)
NoteThe
driver-class-name
parameter is only required if the JDBC driver jar defines more than one class in its/META-INF/services/java.sql.Driver
file.For example, the
/META-INF/services/java.sql.Driver
file in the MySQL 5.1.36 JDBC driver JAR defines two classes:- com.mysql.jdbc.Driver
- com.mysql.fabric.jdbc.FabricMySQLDriver
For this case, you would pass in
driver-class-name=com.mysql.jdbc.Driver
.For example, the following command registers a MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(driver-name=mysql,driver-module-name=com.mysql,driver-xa-datasource-class-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource, driver-class-name=com.mysql.jdbc.Driver)
The JDBC driver is now available to be referenced by application datasources.
13.2.2. Install a JDBC Driver as a JAR Deployment
JDBC drivers can be installed as a JAR deployment using either the management CLI or the management console. As long as the driver is JDBC 4-compliant, it will automatically be recognized and installed as a JDBC driver upon deployment.
The following steps describe how to install a JDBC driver using the management CLI.
The recommended installation method for JDBC drivers is to install them as a core module.
Download the JDBC driver.
Download the appropriate JDBC driver from your database vendor. See JDBC Driver Download Locations for standard download locations for JDBC drivers of common databases.
Make sure to extract the archive if the JDBC driver JAR file is contained within a ZIP or TAR archive.
- If the JDBC driver is not JDBC 4-compliant, see the steps to Update a JDBC Driver JAR to be JDBC 4-Compliant.
Deploy the JAR to JBoss EAP.
deploy PATH_TO_JDBC_JAR
NoteIn a managed domain, specify the appropriate server groups.
For example, the following command deploys a MySQL JDBC driver.
deploy /path/to/mysql-connector-java-5.1.36-bin.jar
A message will be displayed in the JBoss EAP server log that displays the deployed driver name, which will be used when defining datasources.
WFLYJCA0018: Started Driver service with driver-name = mysql-connector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
The JDBC driver is now available to be referenced by application datasources.
Update a JDBC Driver JAR to be JDBC 4-Compliant
If the JDBC driver JAR is not JDBC 4-compliant, it can be made deployable using the following steps.
- Create an empty temporary directory.
-
Create a
META-INF
subdirectory. -
Create a
META-INF/services
subdirectory. Create a
META-INF/services/java.sql.Driver
file and add one line to indicate the fully-qualified class name of the JDBC driver.For example, the below line would be added for a MySQL JDBC driver.
com.mysql.jdbc.Driver
Use the JAR command-line tool to add this new file to the JAR.
jar \-uf jdbc-driver.jar META-INF/services/java.sql.Driver
13.2.3. JDBC Driver Download Locations
The following table gives the standard download locations for JDBC drivers of common databases used with JBoss EAP.
These links point to third-party websites which are not controlled or actively monitored by Red Hat. For the most up-to-date drivers for your database, check your database vendor’s documentation and website.
Table 13.1. JDBC Driver Download Locations
Vendor | Download Location |
---|---|
MySQL | |
PostgreSQL | |
Oracle | http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html |
IBM | |
Sybase | The jConnect JDBC driver is part of the SDK for SAP ASE installation. Currently there is not a separate download site for this driver by itself. |
Microsoft |
13.2.4. Access Vendor-Specific Classes
In some cases, it is necessary for an application to use vendor-specific functionality that is not part of the JDBC API. In these cases, you can access vendor-specific APIs by declaring a dependency in that application.
This is advanced usage. Only applications that need functionality not found in the JDBC API should implement this procedure.
This process is required when using the reauthentication mechanism, and accessing vendor-specific classes.
You can define a dependency for an application using either the MANIFEST.MF
file or a jboss-deployment-structure.xml
file.
If you have not yet done so, Install a JDBC Driver as a Core Module.
Using the MANIFEST.MF
File
-
Edit the application’s
META-INF/MANIFEST.MF
file. Add the
Dependencies
line and specify the module name.For example, the below line declares the
com.mysql
module as a dependency.Dependencies: com.mysql
Using a jboss-deployment-structure.xml
File
-
Create a file called
jboss-deployment-structure.xml
in theMETA-INF/
orWEB-INF/
folder of the application. Specify the module using the
dependencies
element.For example, the following example
jboss-deployment-structure.xml
file declares thecom.mysql
module as a dependency.<jboss-deployment-structure> <deployment> <dependencies> <module name="com.mysql"/> </dependencies> </deployment> </jboss-deployment-structure>
The example code below accesses the MySQL API.
import java.sql.Connection; import org.jboss.jca.adapters.jdbc.WrappedConnection; ... Connection c = ds.getConnection(); WrappedConnection wc = (WrappedConnection)c; com.mysql.jdbc.Connection mc = wc.getUnderlyingConnection();
Follow the vendor-specific API guidelines closely, as the connection is being controlled by the IronJacamar container.
13.3. Creating Datasources
Datasources can be created using the management console or the management CLI.
JBoss EAP 7 allows you to use expressions in datasource attribute values, such as the enabled
attribute. See the Property Replacement section for details on using expressions in the configuration.
13.3.1. Create a Non-XA Datasource
Non-XA datasources can be defined using the data-source add
management CLI command. You can also define non-XA datasources using the management console by navigating to Configuration → Subsystems → Datasources → Non-XA and clicking Add to open the Create Datasource wizard.
The below steps describe how to define a non-XA datasource using the management CLI.
- If you have not yet done so, install and register the appropriate JDBC Driver as a Core Module.
Define the datasource using the
data-source add
command, specifying the appropriate argument values.data-source add --name=DATASOURCE_NAME --jndi-name=JNDI_NAME --driver-name=DRIVER_NAME --connection-url=CONNECTION_URL
NoteIn a managed domain, you must specify the --profile=PROFILE_NAME argument.
See the Datasource Parameters section below for tips on these parameter values.
For detailed examples, see the Example Datasource Configurations for the supported databases.
Datasource Parameters
- jndi-name
-
The JNDI name for the datasource must start with
java:/
orjava:jboss/
. For example,java:jboss/datasources/ExampleDS
. - driver-name
The driver name value depends on whether the JDBC driver was installed as a core module or a JAR deployment.
- For a core module, the driver name value will be the name given to the JDBC driver when it was registered.
For a JAR deployment, the driver name is the name of the JAR if there is only one class listed in its
/META-INF/services/java.sql.Driver
file. If there are multiple classes listed, then the value is JAR_NAME + "_" + DRIVER_CLASS_NAME + "_" + MAJOR_VERSION + "_" + MINOR_VERSION (for examplemysql-connector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
).You can also see the driver name listed in the JBoss EAP server log when the JDBC JAR is deployed.
WFLYJCA0018: Started Driver service with driver-name = mysql-connector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
- connection-url
- For details on the connection URL formats for the supported databases, see the list of Datasource Connection URLs.
For a complete listing of all available datasource parameters, see the Datasource Parameters section.
13.3.2. Create an XA Datasource
XA datasources can be defined using the xa-data-source add
management CLI command. You can also define XA datasources using the management console by navigating to Configuration → Subsystems → Datasources → XA and clicking Add to open the Create XA Datasource wizard.
The below steps describe how to define an XA datasource using the management CLI.
In a managed domain, you will need to specify the profile to use. Depending on the format of the management CLI command, you will either precede the command with /profile=PROFILE_NAME
or pass in the --profile=PROFILE_NAME
argument.
- If you have not yet done so, install and register the appropriate JDBC Driver as a Core Module.
Define the datasource using the
xa-data-source add
command, specifying the appropriate argument values.xa-data-source add --name=XA_DATASOURCE_NAME --jndi-name=JNDI_NAME --driver-name=DRIVER_NAME --xa-datasource-class=XA_DATASOURCE_CLASS --xa-datasource-properties={"ServerName"=>"HOSTNAME","DatabaseName"=>"DATABASE_NAME"}
See the Datasource Parameters section below for tips on these parameter values.
Set XA datasource properties.
At least one XA datasource property is required when defining an XA datasource or you will receive an error when adding the datasource in the previous step. Any properties that were not set when defining the XA datasource can be set individually afterward.
Set the server name.
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME/xa-datasource-properties=ServerName:add(value=HOSTNAME)
Set the database name.
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME/xa-datasource-properties=DatabaseName:add(value=DATABASE_NAME)
For detailed examples, see the Example Datasource Configurations for the supported databases.
Datasource Parameters
- jndi-name
-
The JNDI name for the datasource must start with
java:/
orjava:jboss/
. For example,java:jboss/datasources/ExampleDS
. - driver-name
The driver name value depends on whether the JDBC driver was installed as a core module or a JAR deployment.
- For a core module, the driver name value will be the name given to the JDBC driver when it was registered.
For a JAR deployment, the driver name is the name of the JAR if there is only one class listed in its
/META-INF/services/java.sql.Driver
file. If there are multiple classes listed, then the value is JAR_NAME + "_" + DRIVER_CLASS_NAME + "_" + MAJOR_VERSION + "_" + MINOR_VERSION (for examplemysql-connector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
).You can also see the driver name listed in the JBoss EAP server log when the JDBC JAR is deployed.
WFLYJCA0018: Started Driver service with driver-name = mysql-connector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
- xa-datasource-class
-
Specify the XA datasource class for the JDBC driver’s implementation of the
javax.sql.XADataSource
class. - xa-datasource-properties
- At least one XA datasource property is required when defining an XA datasource or you will receive an error when attempting to add it. Additional properties can also be added to the XA datasource after it has been defined.
For a complete listing of all available datasource parameters, see the Datasource Parameters section.
13.4. Modifying Datasources
Datasources settings can be configured using the management console or the management CLI.
JBoss EAP 7 allows you to use expressions in datasource attribute values, such as the enabled
attribute. See the Property Replacement section for details on using expressions in the configuration.
13.4.1. Modify a Non-XA Datasource
Non-XA datasource settings can be updated using the data-source
management CLI command. You can also update datasource attributes from the datasources
subsystem in the management console.
Non-XA datasources can be integrated with JTA transactions. To integrate the datasource with JTA, ensure that the jta
parameter is set to true
.
Settings for a datasource can be updated by using the following management CLI command.
data-source --name=DATASOURCE_NAME --ATTRIBUTE_NAME=ATTRIBUTE_VALUE
In a managed domain, you must specify the --profile=PROFILE_NAME
argument.
A server reload may be required for the changes to take effect.
13.4.2. Modify an XA Datasource
XA datasource settings can be updated using the xa-data-source
management CLI command. You can also update datasource attributes from the datasources
subsystem in the management console.
Settings for an XA datasource can be updated by using the following management CLI command.
xa-data-source --name=XA_DATASOURCE_NAME --ATTRIBUTE_NAME=ATTRIBUTE_VALUE
NoteIn a managed domain, you must specify the
--profile=PROFILE_NAME
argument.An XA datasource property can be added using the following management CLI command.
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME/xa-datasource-properties=PROPERTY:add(value=VALUE)
NoteIn a managed domain, you must precede this command with
/profile=PROFILE_NAME
.
A server reload may be required for the changes to take effect.
13.5. Removing Datasources
Datasources can be removed using the management console or the management CLI.
13.5.1. Remove a Non-XA Datasource
Non-XA datasources can be removed using the data-source remove
management CLI command. You can also remove datasources from the datasources
subsystem in the management console.
data-source remove --name=DATASOURCE_NAME
In a managed domain, you must specify the --profile=PROFILE_NAME
argument.
The server will require a reload after the datasource is removed.
13.5.2. Remove an XA Datasource
XA datasources can be removed using the xa-data-source remove
management CLI command. You can also remove XA datasources from the datasources
subsystem in the management console.
xa-data-source remove --name=XA_DATASOURCE_NAME
In a managed domain, you must specify the --profile=PROFILE_NAME
argument.
The server will require a reload after the XA datasource is removed.
13.6. Testing Datasource Connections
Once a datasource has been added to JBoss EAP, you can test the connection to verify that the settings are correct. Datasource connections can be tested either using a management CLI command or from the management console with the Test Connection
button in the datasources
subsystem.
The following management CLI command can be used to test a datasource’s connection.
/subsystem=datasources/data-source=DATASOURCE_NAME:test-connection-in-pool
In a managed domain, you must precede this command with /host=HOSTNAME/server=SERVER_NAME
.
13.7. XA Datasource Recovery
An XA datasource is a datasource that can participate in an XA global transaction, which is coordinated by the transaction manager and can span multiple resources in a single transaction. If one of the participants fails to commit its changes, the other participants abort the transaction and restore their state as it was before the transaction occurred. This is to maintain consistency and avoid potential data loss or corruption.
XA recovery is the process of ensuring that all resources affected by a transaction are updated or rolled back, even if any of the resources or transaction participants crash or become unavailable. XA recovery happens without user intervention.
Each XA resource needs to have a recovery module associated with its configuration. The recovery module is the code that is executed when recovery is being performed. JBoss EAP automatically registers recovery modules for JDBC XA resources. You can register a custom module with your XA datasource if you wish to implement custom recovery code. The recovery module must extend class com.arjuna.ats.jta.recovery.XAResourceRecovery
.
13.7.1. Configuring XA Recovery
For most JDBC resources, the recovery module is automatically associated with the resource. In these cases, you only need to configure the options that allow the recovery module to connect to your resource to perform recovery.
The following table describes the XA datasource parameters specific to XA recovery. Each of these configuration attributes can be set during datasource creation or afterward. You can set them using either the management console or the management CLI. See Modify an XA Datasource for information on configuring XA datasources.
Table 13.2. Datasource Parameters for XA Recovery
Attribute | Description |
---|---|
recovery-username | The user name to use to connect to the resource for recovery. Note that if this is not specified, the datasource security settings will be used. |
recovery-password | The password to use to connect to the resource for recovery. Note that if this is not specified, the datasource security settings will be used. |
recovery-security-domain | The security domain to use to connect to the resource for recovery. |
recovery-plugin-class-name |
If you need to use a custom recovery module, set this attribute to the fully-qualified class name of the module. The module should extend class |
recovery-plugin-properties |
If you use a custom recovery module which requires properties to be set, set this attribute to the list of comma-separated |
Disable XA Recovery
If multiple XA datasources connect to the same physical database, then XA recovery typically needs to be configured for only one of them.
Use the following management CLI command to disable recovery for an XA datasource:
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME:write-attribute(name=no-recovery,value=true)
13.7.2. Vendor-Specific XA Recovery
Vendor-Specific Configuration
Some databases require specific configurations in order to cooperate in XA transactions managed by the JBoss EAP transaction manager. For detailed and up-to-date information, see your database vendor’s documentation.
- MySQL
- No special configuration is required. For more information, see the MySQL documentation.
- PostgreSQL and Postgres Plus Advanced Server
-
For PostgreSQL to be able to handle XA transactions, change the configuration parameter
max_prepared_transactions
to a value greater than0
and equal to or greater thanmax_connections
. - Oracle
Ensure that the Oracle user (
USER
) has access to the tables needed for recovery.GRANT SELECT ON sys.dba_pending_transactions TO USER; GRANT SELECT ON sys.pending_trans$ TO USER; GRANT SELECT ON sys.dba_2pc_pending TO USER; GRANT EXECUTE ON sys.dbms_xa TO USER;
If the Oracle user does not have the proper permissions, you may see an error such as the following:
WARN [com.arjuna.ats.jta.logging.loggerI18N] [com.arjuna.ats.internal.jta.recovery.xarecovery1] Local XARecoveryModule.xaRecovery got XA exception javax.transaction.xa.XAException, XAException.XAER_RMERR
- Microsoft SQL Server
- For more information, see the Microsoft SQL Server documentation, including http://msdn.microsoft.com/en-us/library/aa342335.aspx.
- IBM DB2
- No special configuration is required. For more information, see the IBM DB2 documentation.
- Sybase
Sybase expects XA transactions to be enabled on the database. Without correct database configuration, XA transactions will not work. The
enable xact coordination
parameter enables or disables Adaptive Server transaction coordination services. When this parameter is enabled, Adaptive Server ensures that updates to remote Adaptive Server data commit or roll back with the original transaction.To enable transaction coordination, use:
sp_configure 'enable xact coordination', 1
- MariaDB
- No special configuration is required. For more information, see the MariaDB documentation.
Known Issues
These known issues with handling XA transactions are for the specific database and JDBC driver versions supported with JBoss EAP 7. For up-to-date information on the supported databases, see JBoss EAP supported configurations.
- MySQL
- MySQL is not fully capable of handling XA transactions. If a client is disconnected from MySQL, then all the information about such transactions is lost. See this MySQL bug for more information. Note that this issue was fixed in MySQL 5.7.
- PostgreSQL and Postgres Plus Advanced Server
The JDBC driver returns the
XAER_RMERR
XAException error code when a network failure occurs during the commit phase of two-phase commit (2PC). This error signals an unrecoverable catastrophic event to the transaction manager, but the transaction is left in thein-doubt
state on the database side and could be easily corrected after network connection is established again. The correct return code should beXAER_RMFAIL
orXAER_RETRY
. The incorrect error code causes the transaction to be left in theHeuristic
state on the JBoss EAP side and holding locks in the database which requires manual intervention. See this PostgreSQL bug for more information.If a connection failure happens when the one-phase commit optimization is used, the JDBC driver returns
XAER_RMERR
, but theXAER_RMFAIL
error code should be returned. This could lead to data inconsistency if the database commits data during one-phase commit and the connection goes down at that moment, then the client is informed that transaction was rolled back.The Postgres Plus JDBC driver returns XIDs for all prepared transactions that exist in the Postgres Plus Server, so there is no way to determine the database to which the XID belongs. If you define more than one data source for the same database in JBoss EAP, an in-doubt transaction recovery attempt could be run under wrong account, which causes the recovery to fail.
- Oracle
The JDBC driver returns XIDs belonging to all users on the database instance, when the Recovery Manager calls recovery using datasource configured with some user credentials. The JDBC driver throws the exception
ORA-24774: cannot switch to specified transaction
because it tries to recover XIDs belonging to other users.The workaround for this issue is to grant
FORCE ANY TRANSACTION
privilege to the user whose credentials are used in recovery datasource configuration. More information about configuring the privilege can be found here: http://docs.oracle.com/database/121/ADMIN/ds_txnman.htm#ADMIN12259- Microsoft SQL Server
The JDBC driver returns the
XAER_RMERR
XAException error code when a network failure occurs during the commit phase of two-phase commit (2PC). This error signals an unrecoverable catastrophic event to the transaction manager, but the transaction is left in thein-doubt
state on the database side and could be easily corrected after network connection is established again. The correct return code should beXAER_RMFAIL
orXAER_RETRY
. The incorrect error code causes the transaction to be left in theHeuristic
state on the JBoss EAP side and holding locks in the database which requires manual intervention. See this Microsoft SQL Server issue report for more information.If a connection failure happens when the one-phase commit optimization is used, the JDBC driver returns
XAER_RMERR
, but theXAER_RMFAIL
error code should be returned. This could lead to data inconsistency if the database commits data during one-phase commit and the connection goes down at that moment, then the client is informed that transaction was rolled back.- IBM DB2
-
If a connection failure happens during a one-phase commit, the JDBC driver returns
XAER_RETRY
, but theXAER_RMFAIL
error code should be returned. This could lead to data inconsistency if the database commits data during one-phase commit and the connection goes down at that moment, then the client is informed that transaction was rolled back. - Sybase
The JDBC driver returns the
XAER_RMERR
XAException error code when a network failure occurs during the commit phase of two-phase commit (2PC). This error signals an unrecoverable catastrophic event to the transaction manager, but the transaction is left in thein-doubt
state on the database side and could be easily corrected after network connection is established again. The correct return code should beXAER_RMFAIL
orXAER_RETRY
. The incorrect error code causes the transaction to be left in theHeuristic
state on the JBoss EAP side and holding locks in the database which requires manual intervention.If a connection failure happens when the one-phase commit optimization is used, the JDBC driver returns
XAER_RMERR
, but theXAER_RMFAIL
error code should be returned. This could lead to data inconsistency if the database commits data during one-phase commit and the connection goes down at that moment, then the client is informed that transaction was rolled back.- MariaDB
- MariaDB is not fully capable of handling XA transactions. If a client is disconnected from MariaDB, then all the information about such transactions is lost.
13.8. Database Connection Validation
Database maintenance, network problems, or other outage events may cause JBoss EAP to lose the connection to the database. In order to recover from these situations, you can enable database connection validation for your datasources.
To configure database connection validation, you specify the validation timing method (when the validation occurs), the validation mechanism (how the validation is performed), and the exception sorter (how exceptions are handled).
Choose one of the validation timing methods.
- validate-on-match
When the
validate-on-match
option is set totrue
, the database connection is validated every time it is checked out from the connection pool using the validation mechanism specified in the next step.If a connection is not valid, a warning is written to the log and the next connection in the pool is retrieved. This process continues until a valid connection is found. If you prefer not to cycle through every connection in the pool, you can use the
use-fast-fail
option. If a valid connection is not found in the pool, a new connection is created. If the connection creation fails, an exception is returned to the requesting application.This setting results in the quickest recovery but creates the highest load on the database. However, this is the safest selection if the minimal performance hit is not a concern.
- background-validation
When the
background-validation
option is set totrue
, connections are validated periodically in a background thread prior to use. The frequency of the validation is specified by thebackground-validation-millis
property. The default value ofbackground-validation-millis
is0
, meaning that it is disabled.When determining the value of the
background-validation-millis
property, consider the following:-
This value should not be set to the same value as your
idle-timeout-minutes
setting. - The lower the value, the more frequently the pool is validated and the sooner invalid connections are removed from the pool.
- Lower values take more database resources. Higher values result in less frequent connection validation checks and use less database resources, but dead connections are undetected for longer periods of time.
-
This value should not be set to the same value as your
NoteThese options are mutually exclusive. If
validate-on-match
is set totrue
, thenbackground-validation
must be set tofalse
. Ifbackground-validation
is set to true, thenvalidate-on-match
must be set tofalse
.Choose one of the validation mechanisms.
- valid-connection-checker-class-name
Using
valid-connection-checker-class-name
is the preferred validation mechanism. This specifies a connection checker class that is used to validate connections for the particular database in use. JBoss EAP provides the following connection checkers:-
org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLReplicationValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.novendor.JDBC4ValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.novendor.NullValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker
-
org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidConnectionChecker
-
- check-valid-connection-sql
Using
check-valid-connection-sql
, you provide the SQL statement that will be used to validate the connection.The following is an example SQL statement that you might use to validate Oracle connections.
select 1 from dual
The following is an example SQL statement that you might use to validate MySQL or PostgreSQL connections.
select 1
Set the exception sorter class name.
When an exception is marked as fatal, the connection is closed immediately, even if the connection is participating in a transaction. Use the exception sorter class option to properly detect and clean up after fatal connection exceptions. Choose the appropriate JBoss EAP exception sorter for your datasource type.
-
org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.informix.InformixExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.novendor.NullExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter
-
org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSorter
-
13.9. Datasource Security
Datasource security refers to encrypting or obscuring passwords for datasource connections. These passwords can be stored in plain text in configuration files, however this represents a security risk.
The preferred solution for datasource security is the use of either security domains or password vaults. Examples of each are included below.
Secure a Datasource Using a Security Domain
A security domain for the datasource is defined.
<security-domain name="DsRealm" cache-type="default"> <authentication> <login-module code="ConfiguredIdentity" flag="required"> <module-option name="userName" value="sa"/> <module-option name="principal" value="sa"/> <module-option name="password" value="sa"/> </login-module> </authentication> </security-domain>
If a security domain will be used with multiple datasources, then caching should be disabled on the security domain. This can be accomplished by setting the value of the cache-type
attribute to none
or by removing the attribute altogether. However, if caching is desired, then a separate security domain should be used for each datasource.
The DsRealm
security domain is then referenced by the datasource configuration.
<datasources> <datasource jndi-name="java:jboss/datasources/securityDs" pool-name="securityDs"> <connection-url>jdbc:h2:mem:test;DB_CLOSE_DELAY=-1</connection-url> <driver>h2</driver> <new-connection-sql>select current_user()</new-connection-sql> <security> <security-domain>DsRealm</security-domain> </security> </datasource> </datasources>
For more information on using Security Domains, see the How to Configure Identity Management guide.
Secure a Datasource Using a Password Vault
<security> <user-name>admin</user-name> <password>${VAULT::ds_ExampleDS::password::N2NhZDYzOTMtNWE0OS00ZGQ0LWE4MmEtMWNlMDMyNDdmNmI2TElORV9CUkVBS3ZhdWx0}</password> </security>
For more information on using the Password Vault, see the How To Configure Server Security guide.
13.10. Datasource Statistics
You can view core pool and JDBC runtime statistics for defined datasources. See the Datasource Statistics for a detailed list of all available statistics.
Enable Datasource Statistics
By default, datasource statistics are not enabled. The following management CLI commands enable the collection of statistics for the ExampleDS
datasource.
In a managed domain, precede these commands with /profile=PROFILE_NAME
.
/subsystem=datasources/data-source=ExampleDS/statistics=pool:write-attribute(name=statistics-enabled,value=true)
/subsystem=datasources/data-source=ExampleDS/statistics=jdbc:write-attribute(name=statistics-enabled,value=true)
View Datasource Statistics
All datasource statistics can be retrieved from the management CLI. A subset of these statistics can be viewed from the Runtime tab of the management console.
The following management CLI command retrieves the core pool statistics for the ExampleDS
datasource.
In a managed domain, precede these commands with /host=HOST_NAME/server=SERVER_NAME
.
/subsystem=datasources/data-source=ExampleDS/statistics=pool:read-resource(include-runtime=true) { "outcome" => "success", "result" => { "ActiveCount" => 1, "AvailableCount" => 20, "AverageBlockingTime" => 0L, "AverageCreationTime" => 122L, "AverageGetTime" => 128L, "AveragePoolTime" => 0L, "AverageUsageTime" => 0L, "BlockingFailureCount" => 0, "CreatedCount" => 1, "DestroyedCount" => 0, "IdleCount" => 1, ... }
The following management CLI command retrieves the JDBC statistics for the ExampleDS
datasource.
/subsystem=datasources/data-source=ExampleDS/statistics=jdbc:read-resource(include-runtime=true) { "outcome" => "success", "result" => { "PreparedStatementCacheAccessCount" => 0L, "PreparedStatementCacheAddCount" => 0L, "PreparedStatementCacheCurrentSize" => 0, "PreparedStatementCacheDeleteCount" => 0L, "PreparedStatementCacheHitCount" => 0L, "PreparedStatementCacheMissCount" => 0L, "statistics-enabled" => true } }
Since statistics are runtime information, be sure to specify the include-runtime=true
argument.
13.11. Capacity Policies
JBoss EAP supports defining capacity polices for JCA deployments, including datasources. Capacity policies define how physical connections for a pool are created (capacity incrementing) and destroyed (capacity decrementing). The default policies are set to create once connection per request for capacity incrementing, and destroy all connections when they time out when the idle timeout is scheduled for capacity decrementing.
To configure capacity polices, you need to specify a capacity incrementer and/or decrementer class:
Example commands
/subsystem=datasources/data-source=ExampleDS:write-attribute(name=capacity-incrementer-class, value="org.jboss.jca.core.connectionmanager.pool.capacity.SizeIncrementer") /subsystem=datasources/data-source=ExampleDS:write-attribute(name=capacity-decrementer-class, value="org.jboss.jca.core.connectionmanager.pool.capacity.SizeDecrementer")
You can also configure properties on the specified capacity incrementer or decrementer class:
Example Commands
/subsystem=datasources/data-source=ExampleDS:write-attribute(name=capacity-incrementer-properties.size, value=2) /subsystem=datasources/data-source=ExampleDS:write-attribute(name=capacity-decrementer-properties.size, value=2)
MaxPoolSize Incrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.MaxPoolSizeIncrementer
The MaxPoolSize incrementer policy will fill the pool to its max size for each request. This policy is useful when you want to keep the maximum number of connections available all the time.
Size Incrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.SizeIncrementer
The Size incrementer policy will fill the pool by the specified number of connections for each request. This policy is useful when you want to increment with an additional number of connections per request in anticipation that the next request will also need a connection.
Table 13.3. Size policy properties
Name | Description |
---|---|
Size | The number of connections that should be created |
This is the default increment policy with a size value of 1.
Watermark Incrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.WatermarkIncrementer
The Watermark incrementer policy will fill the pool to the specified number of connections for each request. This policy is useful when you want to keep a specified number of connections in the pool at all time.
Table 13.4. Watermark policy properties
Name | Description |
---|---|
Watermark | The watermark level for the number of connections |
MinPoolSize Decrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.MinPoolSizeDecrementer
The MinPoolSize decrementer policy will decrement the pool to its min size for each request. This policy is useful when you want to limit the number of connections after each idle timeout request. The pool will operate in a First In First Out (FIFO) manner.
Size Decrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.SizeDecrementer
The Size decrementer policy will decrement the pool by the specified number of connections for each idle timeout request.
Table 13.5. Size policy properties
Name | Description |
---|---|
Size | The number of connections that should be destroyed |
This policy is useful when you want to decrement an additional number of connections per idle timeout request in anticipation that the pool usage will lower over time.
The pool will operate in a First In First Out (FIFO) manner.
TimedOut Decrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.TimedOutDecrementer
The TimedOut decrementer policy will removed all connections that have timed out from the pool for each idle timeout request. The pool will operate in a First In Last Out (FILO) manner.
This policy is the default decrement policy.
TimedOut/FIFO Decrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.TimedOutFIFODecrementer
The TimedOutFIFO decrementer policy will removed all connections that have timed out from the pool for each idle timeout request. The pool will operate in a First In First Out (FIFO) manner.
Watermark Decrementer Policy
Class name: org.jboss.jca.core.connectionmanager.pool.capacity.WatermarkDecrementer
The Watermark decrementer policy will decrement the pool to the specified number of connections for each idle timeout request. This policy is useful when you want to keep a specified number of connections in the pool at all time. The pool will operate in a First In First Out (FIFO) manner.
Table 13.6. Watermark policy properties
Name | Description |
---|---|
Watermark | The watermark level for the number of connections |
13.12. Enlistment Tracing
Enlistment traces are recorded in order to help locate error situations that happens during enlistment of XAResource
instances. This does have a performance overhead, so in certain situations you may want to disable these traces.
You can disable the recording of enlistment traces for a datasource using the management CLI by setting the enlistment-trace
attribute to false
.
Disable enlistment trace for a non-XA datasource.
data-source --name=DATASOURCE_NAME --enlistment-trace=false
Disable enlistment trace for an XA datasource.
xa-data-source --name=XA_DATASOURCE_NAME --enlistment-trace=false
Disabling the enlistment trace will make tracking down errors during transaction enlistment more difficult.
13.13. Example Datasource Configurations
13.13.1. Example MySQL Datasource
This is an example of a MySQL datasource configuration with connection information, basic security, and validation options.
Example MySQL Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/MySqlDS" pool-name="MySqlDS"> <connection-url>jdbc:mysql://localhost:3306/jbossdb</connection-url> <driver>mysql</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/> </validation> </datasource> <drivers> <driver name="mysql" module="com.mysql"> <driver-class>com.mysql.jdbc.Driver</driver-class> <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example MySQL JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.mysql"> <resources> <resource-root path="mysql-connector-java-5.1.36-bin.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the MySQL JDBC driver as a core module.
module add --name=com.mysql --resources=/path/to/mysql-connector-java-5.1.36-bin.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(driver-name=mysql,driver-module-name=com.mysql,driver-xa-datasource-class-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource, driver-class-name=com.mysql.jdbc.Driver)
Add the MySQL datasource.
data-source add --name=MySqlDS --jndi-name=java:jboss/MySqlDS --driver-name=mysql --connection-url=jdbc:mysql://localhost:3306/jbossdb --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter
13.13.2. Example MySQL XA Datasource
This is an example of a MySQL XA datasource configuration with XA datasource properties, basic security, and validation options.
Example MySQL XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/MySqlXADS" pool-name="MySqlXADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="DatabaseName"> mysqldb </xa-datasource-property> <driver>mysql</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="mysql" module="com.mysql"> <driver-class>com.mysql.jdbc.Driver</driver-class> <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example MySQL JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.mysql"> <resources> <resource-root path="mysql-connector-java-5.1.36-bin.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the MySQL JDBC driver as a core module.
module add --name=com.mysql --resources=/path/to/mysql-connector-java-5.1.36-bin.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(driver-name=mysql,driver-module-name=com.mysql,driver-xa-datasource-class-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource, driver-class-name=com.mysql.jdbc.Driver)
Add the MySQL XA datasource.
xa-data-source add --name=MySqlXADS --jndi-name=java:jboss/MySqlXADS --driver-name=mysql --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter --xa-datasource-properties={"ServerName"=>"localhost","DatabaseName"=>"mysqldb"}
13.13.3. Example PostgreSQL Datasource
This is an example of a PostgreSQL datasource configuration with connection information, basic security, and validation options.
Example PostgreSQL Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/PostgresDS" pool-name="PostgresDS"> <connection-url>jdbc:postgresql://localhost:5432/postgresdb</connection-url> <driver>postgresql</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter"/> </validation> </datasource> <drivers> <driver name="postgresql" module="com.postgresql"> <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example PostgreSQL JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.postgresql"> <resources> <resource-root path="postgresql-9.3-1102.jdbc4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the PostgreSQL JDBC driver as a core module.
module add --name=com.postgresql --resources=/path/to/postgresql-9.3-1102.jdbc4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the PostgreSQL JDBC driver.
/subsystem=datasources/jdbc-driver=postgresql:add(driver-name=postgresql,driver-module-name=com.postgresql,driver-xa-datasource-class-name=org.postgresql.xa.PGXADataSource)
Add the PostgreSQL datasource.
data-source add --name=PostgresDS --jndi-name=java:jboss/PostgresDS --driver-name=postgresql --connection-url=jdbc:postgresql://localhost:5432/postgresdb --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter
13.13.4. Example PostgreSQL XA Datasource
This is an example of a PostgreSQL XA datasource configuration with XA datasource properties, basic security, and validation options.
Example PostgreSQL XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/PostgresXADS" pool-name="PostgresXADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="PortNumber"> 5432 </xa-datasource-property> <xa-datasource-property name="DatabaseName"> postgresdb </xa-datasource-property> <driver>postgresql</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="postgresql" module="com.postgresql"> <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example PostgreSQL JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.postgresql"> <resources> <resource-root path="postgresql-9.3-1102.jdbc4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the PostgreSQL JDBC driver as a core module.
module add --name=com.postgresql --resources=/path/to/postgresql-9.3-1102.jdbc4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the PostgreSQL JDBC driver.
/subsystem=datasources/jdbc-driver=postgresql:add(driver-name=postgresql,driver-module-name=com.postgresql,driver-xa-datasource-class-name=org.postgresql.xa.PGXADataSource)
Add the PostgreSQL XA datasource.
xa-data-source add --name=PostgresXADS --jndi-name=java:jboss/PostgresXADS --driver-name=postgresql --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter --xa-datasource-properties={"ServerName"=>"localhost","PortNumber"=>"5432","DatabaseName"=>"postgresdb"}
13.13.5. Example Oracle Datasource
This is an example of an Oracle datasource configuration with connection information, basic security, and validation options.
Example Oracle Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/OracleDS" pool-name="OracleDS"> <connection-url>jdbc:oracle:thin:@localhost:1521:XE</connection-url> <driver>oracle</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker"/> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter"/> </validation> </datasource> <drivers> <driver name="oracle" module="com.oracle"> <xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Oracle JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.oracle"> <resources> <resource-root path="ojdbc7.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Oracle JDBC driver as a core module.
module add --name=com.oracle --resources=/path/to/misc/jdbc_drivers/oracle/ojdbc7.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Oracle JDBC driver.
/subsystem=datasources/jdbc-driver=oracle:add(driver-name=oracle,driver-module-name=com.oracle,driver-xa-datasource-class-name=oracle.jdbc.xa.client.OracleXADataSource)
Add the Oracle datasource.
data-source add --name=OracleDS --jndi-name=java:jboss/OracleDS --driver-name=oracle --connection-url=jdbc:oracle:thin:@localhost:1521:XE --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter --stale-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker
13.13.6. Example Oracle XA Datasource
The following settings must be applied for the user accessing an Oracle XA datasource in order for XA recovery to operate correctly. The value user
is the user defined to connect from JBoss EAP to Oracle:
-
GRANT SELECT ON sys.dba_pending_transactions TO user;
-
GRANT SELECT ON sys.pending_trans$ TO user;
-
GRANT SELECT ON sys.dba_2pc_pending TO user;
-
GRANT EXECUTE ON sys.dbms_xa TO user;
This is an example of an Oracle XA datasource configuration with XA datasource properties, basic security, and validation options.
Example Oracle XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/OracleXADS" pool-name="OracleXADS"> <xa-datasource-property name="URL"> jdbc:oracle:thin:@oracleHostName:1521:orcl </xa-datasource-property> <driver>oracle</driver> <xa-pool> <is-same-rm-override>false</is-same-rm-override> </xa-pool> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker"/> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="oracle" module="com.oracle"> <xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Oracle JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.oracle"> <resources> <resource-root path="ojdbc7.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Oracle JDBC driver as a core module.
module add --name=com.oracle --resources=/path/to/misc/jdbc_drivers/oracle/ojdbc7.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Oracle JDBC driver.
/subsystem=datasources/jdbc-driver=oracle:add(driver-name=oracle,driver-module-name=com.oracle,driver-xa-datasource-class-name=oracle.jdbc.xa.client.OracleXADataSource)
Add the Oracle XA datasource.
xa-data-source add --name=OracleXADS --jndi-name=java:jboss/OracleXADS --driver-name=oracle --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSorter --stale-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleConnectionChecker --same-rm-override=false --xa-datasource-properties={"URL"=>"jdbc:oracle:thin:@oracleHostName:1521:orcl"}
13.13.7. Example Microsoft SQL Server Datasource
This is an example of a Microsoft SQL Server datasource configuration with connection information, basic security, and validation options.
Example Microsoft SQL Server Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/MSSQLDS" pool-name="MSSQLDS"> <connection-url>jdbc:sqlserver://localhost:1433;DatabaseName=MyDatabase</connection-url> <driver>sqlserver</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter"/> </validation> </datasource> <drivers> <driver name="sqlserver" module="com.microsoft"> <xa-datasource-class>com.microsoft.sqlserver.jdbc.SQLServerXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Microsoft SQL Server JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.microsoft"> <resources> <resource-root path="sqljdbc41.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Microsoft SQL Server JDBC driver as a core module.
module add --name=com.microsoft --resources=/path/to/sqljdbc41.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Microsoft SQL Server JDBC driver.
/subsystem=datasources/jdbc-driver=sqlserver:add(driver-name=sqlserver,driver-module-name=com.microsoft,driver-xa-datasource-class-name=com.microsoft.sqlserver.jdbc.SQLServerXADataSource)
Add the Microsoft SQL Server datasource.
data-source add --name=MSSQLDS --jndi-name=java:jboss/MSSQLDS --driver-name=sqlserver --connection-url=jdbc:sqlserver://localhost:1433;DatabaseName=MyDatabase --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter
13.13.8. Example Microsoft SQL Server XA Datasource
This is an example of a Microsoft SQL Server XA datasource configuration with XA datasource properties, basic security, and validation options.
Example Microsoft SQL Server XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/MSSQLXADS" pool-name="MSSQLXADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="DatabaseName"> mssqldb </xa-datasource-property> <xa-datasource-property name="SelectMethod"> cursor </xa-datasource-property> <driver>sqlserver</driver> <xa-pool> <is-same-rm-override>false</is-same-rm-override> </xa-pool> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="sqlserver" module="com.microsoft"> <xa-datasource-class>com.microsoft.sqlserver.jdbc.SQLServerXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Microsoft SQL Server JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.microsoft"> <resources> <resource-root path="sqljdbc41.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Microsoft SQL Server JDBC driver as a core module.
module add --name=com.microsoft --resources=/path/to/sqljdbc41.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Microsoft SQL Server JDBC driver.
/subsystem=datasources/jdbc-driver=sqlserver:add(driver-name=sqlserver,driver-module-name=com.microsoft,driver-xa-datasource-class-name=com.microsoft.sqlserver.jdbc.SQLServerXADataSource)
Add the Microsoft SQL Server XA datasource.
xa-data-source add --name=MSSQLXADS --jndi-name=java:jboss/MSSQLXADS --driver-name=sqlserver --user-name=admin --password=admin --validate-on-match=true --background-validation=false --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter --same-rm-override=false --xa-datasource-properties={"ServerName"=>"localhost","DatabaseName"=>"mssqldb","SelectMethod"=>"cursor"}
13.13.9. Example IBM DB2 Datasource
This is an example of an IBM DB2 datasource configuration with connection information, basic security, and validation options.
Example IBM DB2 Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/DB2DS" pool-name="DB2DS"> <connection-url>jdbc:db2://localhost:50000/ibmdb2db</connection-url> <driver>ibmdb2</driver> <pool> <min-pool-size>0</min-pool-size> <max-pool-size>50</max-pool-size> </pool> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectionChecker"/> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter"/> </validation> </datasource> <drivers> <driver name="ibmdb2" module="com.ibm"> <xa-datasource-class>com.ibm.db2.jcc.DB2XADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example IBM DB2 JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.ibm"> <resources> <resource-root path="db2jcc4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the IBM DB2 JDBC driver as a core module.
module add --name=com.ibm --resources=/path/to/db2jcc4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the IBM DB2 JDBC driver.
/subsystem=datasources/jdbc-driver=ibmdb2:add(driver-name=ibmdb2,driver-module-name=com.ibm,driver-xa-datasource-class-name=com.ibm.db2.jcc.DB2XADataSource)
Add the IBM DB2 datasource.
data-source add --name=DB2DS --jndi-name=java:jboss/DB2DS --driver-name=ibmdb2 --connection-url=jdbc:db2://localhost:50000/ibmdb2db --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter --stale-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectionChecker --min-pool-size=0 --max-pool-size=50
13.13.10. Example IBM DB2 XA Datasource
This is an example of an IBM DB2 XA datasource configuration with XA datasource properties, basic security, and validation options.
Example IBM DB2 XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/DB2XADS" pool-name="DB2XADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="DatabaseName"> ibmdb2db </xa-datasource-property> <xa-datasource-property name="PortNumber"> 50000 </xa-datasource-property> <xa-datasource-property name="DriverType"> 4 </xa-datasource-property> <driver>ibmdb2</driver> <xa-pool> <is-same-rm-override>false</is-same-rm-override> </xa-pool> <security> <user-name>admin</user-name> <password>admin</password> </security> <recovery> <recover-plugin class-name="org.jboss.jca.core.recovery.ConfigurableRecoveryPlugin"> <config-property name="EnableIsValid"> false </config-property> <config-property name="IsValidOverride"> false </config-property> <config-property name="EnableClose"> false </config-property> </recover-plugin> </recovery> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectionChecker"/> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="ibmdb2" module="com.ibm"> <xa-datasource-class>com.ibm.db2.jcc.DB2XADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example IBM DB2 JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.ibm"> <resources> <resource-root path="db2jcc4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the IBM DB2 JDBC driver as a core module.
module add --name=com.ibm --resources=/path/to/db2jcc4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the IBM DB2 JDBC driver.
/subsystem=datasources/jdbc-driver=ibmdb2:add(driver-name=ibmdb2,driver-module-name=com.ibm,driver-xa-datasource-class-name=com.ibm.db2.jcc.DB2XADataSource)
Add the IBM DB2 XA datasource.
xa-data-source add --name=DB2XADS --jndi-name=java:jboss/DB2XADS --driver-name=ibmdb2 --user-name=admin --password=admin --validate-on-match=true --background-validation=false --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter --stale-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectionChecker --same-rm-override=false --recovery-plugin-class-name=org.jboss.jca.core.recovery.ConfigurableRecoveryPlugin --recovery-plugin-properties={"EnableIsValid"=>"false","IsValidOverride"=>"false","EnableClose"=>"false"} --xa-datasource-properties={"ServerName"=>"localhost","DatabaseName"=>"ibmdb2db","PortNumber"=>"50000","DriverType"=>"4"}
13.13.11. Example Sybase Datasource
This is an example of a Sybase datasource configuration with connection information, basic security, and validation options.
Example Sybase Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/SybaseDB" pool-name="SybaseDB"> <connection-url>jdbc:sybase:Tds:localhost:5000/DATABASE?JCONNECT_VERSION=6</connection-url> <driver>sybase</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSorter"/> </validation> </datasource> <drivers> <driver name="sybase" module="com.sybase"> <xa-datasource-class>com.sybase.jdbc4.jdbc.SybXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Sybase JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.sybase"> <resources> <resource-root path="jconn4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Sybase JDBC driver as a core module.
module add --name=com.sybase --resources=/path/to/jconn4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Sybase JDBC driver.
/subsystem=datasources/jdbc-driver=sybase:add(driver-name=sybase,driver-module-name=com.sybase,driver-xa-datasource-class-name=com.sybase.jdbc4.jdbc.SybXADataSource)
Add the Sybase datasource.
data-source add --name=SybaseDB --jndi-name=java:jboss/SybaseDB --driver-name=sybase --connection-url=jdbc:sybase:Tds:localhost:5000/DATABASE?JCONNECT_VERSION=6 --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSorter
13.13.12. Example Sybase XA Datasource
This is an example of a Sybase XA datasource configuration with XA datasource properties, basic security, and validation options.
Example Sybase XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/SybaseXADS" pool-name="SybaseXADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="DatabaseName"> mydatabase </xa-datasource-property> <xa-datasource-property name="PortNumber"> 4100 </xa-datasource-property> <xa-datasource-property name="NetworkProtocol"> Tds </xa-datasource-property> <driver>sybase</driver> <xa-pool> <is-same-rm-override>false</is-same-rm-override> </xa-pool> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="sybase" module="com.sybase"> <xa-datasource-class>com.sybase.jdbc4.jdbc.SybXADataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example Sybase JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="com.sybase"> <resources> <resource-root path="jconn4.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the Sybase JDBC driver as a core module.
module add --name=com.sybase --resources=/path/to/jconn4.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the Sybase JDBC driver.
/subsystem=datasources/jdbc-driver=sybase:add(driver-name=sybase,driver-module-name=com.sybase,driver-xa-datasource-class-name=com.sybase.jdbc4.jdbc.SybXADataSource)
Add the Sybase XA datasource.
xa-data-source add --name=SybaseXADS --jndi-name=java:jboss/SybaseXADS --driver-name=sybase --user-name=admin --password=admin --validate-on-match=true --background-validation=false --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSorter --same-rm-override=false --xa-datasource-properties={"ServerName"=>"localhost","DatabaseName"=>"mydatabase","PortNumber"=>"4100","NetworkProtocol"=>"Tds"}
13.13.13. Example MariaDB Datasource
This is an example of a MariaDB datasource configuration with connection information, basic security, and validation options.
Example MariaDB Datasource Configuration
<datasources> <datasource jndi-name="java:jboss/MariaDBDS" pool-name="MariaDBDS"> <connection-url>jdbc:mariadb://localhost:3306/jbossdb</connection-url> <driver>mariadb</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/> </validation> </datasource> <drivers> <driver name="mariadb" module="org.mariadb"> <driver-class>org.mariadb.jdbc.Driver</driver-class> <xa-datasource-class>org.mariadb.jdbc.MySQLDataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example MariaDB JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="org.mariadb"> <resources> <resource-root path="mariadb-java-client-1.2.3.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the MariaDB JDBC driver as a core module.
module add --name=org.mariadb --resources=/path/to/mariadb-java-client-1.2.3.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the MariaDB JDBC driver.
/subsystem=datasources/jdbc-driver=mariadb:add(driver-name=mariadb,driver-module-name=org.mariadb,driver-xa-datasource-class-name=org.mariadb.jdbc.MySQLDataSource, driver-class-name=org.mariadb.jdbc.Driver)
Add the MariaDB datasource.
data-source add --name=MariaDBDS --jndi-name=java:jboss/MariaDBDS --driver-name=mariadb --connection-url=jdbc:mariadb://localhost:3306/jbossdb --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter
13.13.14. Example MariaDB XA Datasource
This is an example of a MariaDB XA datasource configuration with XA datasource properties, basic security, and validation options.
Example MariaDB XA Datasource Configuration
<datasources> <xa-datasource jndi-name="java:jboss/MariaDBXADS" pool-name="MariaDBXADS"> <xa-datasource-property name="ServerName"> localhost </xa-datasource-property> <xa-datasource-property name="DatabaseName"> mariadbdb </xa-datasource-property> <driver>mariadb</driver> <security> <user-name>admin</user-name> <password>admin</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/> <validate-on-match>true</validate-on-match> <background-validation>false</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/> </validation> </xa-datasource> <drivers> <driver name="mariadb" module="org.mariadb"> <driver-class>org.mariadb.jdbc.Driver</driver-class> <xa-datasource-class>org.mariadb.jdbc.MySQLDataSource</xa-datasource-class> </driver> </drivers> </datasources>
Example MariaDB JDBC Driver module.xml
File
<?xml version="1.0" ?> <module xmlns="urn:jboss:module:1.1" name="org.mariadb"> <resources> <resource-root path="mariadb-java-client-1.2.3.jar"/> </resources> <dependencies> <module name="javax.api"/> <module name="javax.transaction.api"/> </dependencies> </module>
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
Add the MariaDB JDBC driver as a core module.
module add --name=org.mariadb --resources=/path/to/mariadb-java-client-1.2.3.jar --dependencies=javax.api,javax.transaction.api
ImportantUsing the
module
management CLI command to add and remove modules is provided as technology preview only. This command is not appropriate for use in a managed domain or when connecting to the management CLI remotely. Modules should be added and removed manually in a production environment.Register the MariaDB JDBC driver.
/subsystem=datasources/jdbc-driver=mariadb:add(driver-name=mariadb,driver-module-name=org.mariadb,driver-xa-datasource-class-name=org.mariadb.jdbc.MySQLDataSource, driver-class-name=org.mariadb.jdbc.Driver)
Add the MariaDB XA datasource.
xa-data-source add --name=MariaDBXADS --jndi-name=java:jboss/MariaDBXADS --driver-name=mariadb --user-name=admin --password=admin --validate-on-match=true --background-validation=false --valid-connection-checker-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker --exception-sorter-class-name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter --xa-datasource-properties={"ServerName"=>"localhost","DatabaseName"=>"mariadbdb"}
Chapter 14. Configuring Transactions
14.1. Transactions Subsystem Configuration
14.1.1. Configuring the Transaction Manager
You can configure the transaction manager using the web-based management console or the command line management CLI.
Configuring the Transaction Manager Using the Management Console
The following steps explain how to configure the transaction manager using the web-based management console:
- Select the Configuration tab from the top of the screen.
- If you are running JBoss EAP as a managed domain, choose the desired profile to modify.
- From the Subsystem list, select Transactions and click View.
- Click Edit on the appropriate tab for the settings that you want to edit, such as Recovery for recovery options.
- Make the necessary changes and click Save to save the changes.
- Click Need Help? to display help text.
Configuring the Transaction Manager Using the Management CLI
Using the management CLI, you can configure the transaction manager using a series of commands. The commands all begin with /subsystem=transactions
for a standalone server or /profile=default/subsystem=transactions/
for the default
profile in a managed domain.
For a detailed listing of all the transaction manager configuration options, see the Transaction Manager Configuration Options for JBoss EAP.
14.1.2. Configuring Your Datasource to Use JTA
This task shows you how to enable Java Transaction API (JTA) on your datasource.
Prerequisites
- Your database must support Java Transaction API. If in doubt, consult the documentation for your database.
Create a non-XA datasource.
NoteXA datasources are already JTA capable by default.
Configuring the Datasource to use Java Transaction API
Use the following management CLI command to set the
jta
attribute totrue
./subsystem=datasources/data-source=DATASOURCE_NAME:write-attribute(name=jta,value=true)
NoteIn a managed domain, precede this command with
/profile=PROFILE_NAME
.Reload the server for the changes to take effect.
reload
Your datasource is now configured to use JTA.
14.1.3. About Transaction Log Messages
You can track the transaction status while keeping the log files readable by using the DEBUG
log level for the transaction logger. For detailed debugging, use the TRACE
log level. Refer to Configuring Logging for the Transactions Subsystem for information on configuring the transaction logger.
Transaction Manager (TM) can generate a lot of logging information when configured to log in the TRACE
log level. Following are some of the most commonly-seen messages. This list is not comprehensive, so you may see messages other than these.
Table 14.1. Transaction State Change
Transaction Begin |
When a transaction begins, a method |
Transaction Commit |
When a transaction commits, a method |
Transaction Rollback |
When a transaction rolls back, a method |
Transaction Timeout |
When a transaction times out, a method |
14.1.4. Configuring Logging for the Transactions Subsystem
You can control the amount of information logged about transactions, independent of other logging settings in JBoss EAP. You can configure the logging settings using the management console or the management CLI.
Configuring the Transaction Logger Using the Management Console
Navigate to the Logging subsystem configuration.
- In the management console, click the Configuration tab. If you use a managed domain, you must first choose the appropriate server profile.
- Select the Logging subsystem and click View.
Edit the
com.arjuna
attributes.Select the Log Categories tab. The
com.arjuna
entry is already present. Selectcom.arjuna
and click Edit in the Attributes section. You can change the log level and choose whether to use parent handlers or not.Log Level:
As transactions can produce a lot of logging output, the default logging level is set to
WARN
so that the server log is not overwhelmed by transaction output. If you need to check transaction processing details, use theTRACE
log level so that transaction IDs are shown.Use Parent Handlers:
Parent handler indicates whether the logger should send its output to its parent logger. The default behavior is
true
.
- Click Save to save the changes.
Configuring the Transaction Logger Using the Management CLI
Use the following command to set the logging level from the management CLI. For a standalone server, remove the /profile=default
from the command.
/profile=default/subsystem=logging/logger=com.arjuna:write-attribute(name=level,value=VALUE)
14.2. Transaction Administration
14.2.1. Browse and Manage Transactions
The management CLI supports the ability to browse and manipulate transaction records. This functionality is provided by the interaction between the TM and the management API of JBoss EAP.
The TM stores information about each pending transaction and the participants involved the transaction, in a persistent storage called the object store. The management API exposes the object store as a resource called the log-store
. The probe
operation reads the transaction logs and creates a node path for each record. You can call the probe
operation manually, whenever you need to refresh the log-store
. It is normal for transaction logs to appear and disappear quickly.
Refresh the Log Store
The following command refreshes the log store for server groups which use the profile default
in a managed domain. For a standalone server, remove the profile=default
from the command.
/profile=default/subsystem=transactions/log-store=log-store:probe
View All Prepared Transactions
To view all prepared transactions, first refresh the log store (see Refresh the Log Store), then run the following command, which functions similarly to a file system ls
command.
ls /profile=default/subsystem=transactions/log-store=log-store/transactions
Or
/host=master/server=server-one/subsystem=transactions/log-store=log-store:read-children-names(child-type=transactions)
Each transaction is shown, along with its unique identifier. Individual operations can be run against an individual transaction (see Manage a Transaction).
14.2.1.1. Manage a Transaction
View the Attributes of a Transaction
To view information about a transaction, such as its JNDI name, EIS product name and version, or its status, use the read-resource
operation.
/profile=default/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:read-resource
View the Details of a Transaction Participant
Each transaction log contains a child element called participants
. Use the read-resource
operation on this element to see the details of a participant of the transaction. Participants are identified by their JNDI names.
/profile=default/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9/participants=java\:\/JmsXA:read-resource
The result may look similar to this:
{ "outcome" => "success", "result" => { "eis-product-name" => "ActiveMQ", "eis-product-version" => "2.0", "jndi-name" => "java:/JmsXA", "status" => "HEURISTIC", "type" => "/StateManager/AbstractRecord/XAResourceRecord" } }
The outcome status shown here is in a HEURISTIC
state and is eligible for recovery. See Recover a Transaction Participant for more details.
In special cases it is possible to create orphan records in the object store, that is XAResourceRecords, which do not have any corresponding transaction record in the log. For example, XA resource prepared but crashed before the TM recorded and is inaccessible for the domain management API. To access such records you need to set management option expose-all-logs
to true
. This option is not saved in management model and is restored to false
when the server is restarted.
/profile=default/subsystem=transactions/log-store=log-store:write-attribute(name=expose-all-logs, value=true)
You can use this alternate command, which shows participant IDs of transaction in an aggregated form.
/host=master/server=server-one/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:read-children-names(child-type=participants)
Delete a Transaction
Each transaction log supports a delete
operation, to delete the transaction log representing the transaction.
/profile=default/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:delete
This deletes all participants in the transaction as well.
Recover a Transaction Participant
Each transaction participant supports recovery by using the recover
operation.
/profile=default/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9/participants=2:recover
If the transaction participant’s status is HEURISTIC
, the recover
operation switches the status to PREPARE
and asks the periodic recovery process to replay the commit.
If the commit is successful, the participant is removed from the transaction log. You can verify this by running the probe
operation on the log-store
and checking that the participant is no longer listed. If this is the last participant, the transaction is also deleted.
Refresh the Status of a Transaction Participant
If a transaction needs recovery, you can use the refresh
operation to be sure it still requires recovery, before attempting the recovery.
/profile=default/subsystem=transactions/log-store=log-store/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9/participants=2:refresh
14.2.2. View Transaction Statistics
If transaction manager statistics are enabled, you can view statistics on processed transactions by the transaction manager. See Configuring the Transaction Manager for information about how to enable transaction manager statistics.
You can view statistics using either the management console or the management CLI. In the management console, transaction statistics are available by navigating to the Transactions subsystem from the Runtime tab. From the management CLI, you can view statistics by using include-runtime=true
to the read-resource
operation. For example:
/subsystem=transactions:read-resource(include-runtime=true)
The following table shows each available statistic and its description.
Table 14.2. Transactions Subsystem Statistics
Statistic | Description |
---|---|
number-of-transactions | The total number of transactions processed by the transaction manager on this server. |
number-of-committed-transactions | The number of committed transactions processed by the transaction manager on this server. |
number-of-aborted-transactions | The number of aborted transactions processed by the transaction manager on this server. |
number-of-timed-out-transactions | The number of timed out transactions processed by the transaction manager on this server. The number of timed out transactions is calculated to number of aborted transactions too. |
number-of-heuristics | Number of transactions in a heuristic state. |
number-of-inflight-transactions | Number of transactions which have begun but not yet terminated. |
number-of-application-rollbacks | The number of failed transactions whose failure origin was an application. |
number-of-resource-rollbacks | The number of failed transactions whose failure origin was a resource. |
14.2.3. Transactions Object Store
Transactions need a place to store objects. One of the options for object storage is a JDBC datasource. If performance is a particular concern, the JDBC object store can be slower than a file system or ActiveMQ journal object store.
If the transactions
subsystem is configured to use Apache ActiveMQ Artemis journal as storage type for transaction logs, then two instances of JBoss EAP are not permitted to use the same directory for storing the journal. Application server instances can not share the same location and each has to configure a unique location for it.
Losing a transaction object store can lead to losing data consistency. Thus, the object store needs to be placed on a safe drive.
Use a JDBC Datasource as a Transactions Object Store
Follow the below steps to use a JDBC datasource as a transactions object store.
-
Create a datasource, for example,
TransDS
. For instructions, see Create a Non-XA datasource. Note that the datasource’s JDBC driver must be installed as a core module, not as a JAR deployment, for the object store to work properly. Set the datasource’s
jta
attribute tofalse
./subsystem=datasources/data-source=TransDS:write-attribute(name=jta, value=false)
Set the
jdbc-store-datasource
attribute to the JNDI name for the datasource to use, for example,java:jboss/datasources/TransDS
./subsystem=transactions:write-attribute(name=jdbc-store-datasource, value=java:jboss/datasources/TransDS)
Set the
use-jdbc-store
attribute totrue
./subsystem=transactions:write-attribute(name=use-jdbc-store, value=true)
- Restart the JBoss EAP server for the changes to take effect.
Transactions JDBC Store Attributes
The following table identifies all of the available attributes related to JDBC object storage.
Table 14.3. Transactions JDBC Store Attributes
Property | Description |
---|---|
use-jdbc-store |
Set this to |
jdbc-store-datasource | The JNDI name of the JDBC datasource used for storage. |
jdbc-action-store-drop-table |
Whether to drop and recreate the action store tables at launch. The default is |
jdbc-action-store-table-prefix | The prefix for the action store table names. |
jdbc-communication-store-drop-table |
Whether to drop and recreate the communication store tables at launch. The default is |
jdbc-communication-store-table-prefix | The prefix for the communication store table names. |
jdbc-state-store-drop-table |
Whether to drop and recreate the state store tables at launch. The default is |
jdbc-state-store-table-prefix | The prefix for the state store table names. |
Use the ActiveMQ Journal Object Store
Follow the below steps to use an ActiveMQ journal object store.
Set the
use-journal-store
attribute totrue
./subsystem=transactions:write-attribute(name=use-journal-store,value=true)
- Restart the JBoss EAP server for the changes to take effect.
Chapter 15. ORB Configuration
15.1. About Common Object Request Broker Architecture (CORBA)
Common Object Request Broker Architecture (CORBA) is a standard that enables applications and services to work together even when they are written in multiple, otherwise-incompatible, languages or hosted on separate platforms. CORBA requests are brokered by a server-side component called an Object Request Broker (ORB). JBoss EAP provides an ORB instance, by means of the Open JDK ORB component.
The ORB is used internally for Java Transaction Service (JTS) transactions, and is also available for use by your own applications.
15.2. Configure the ORB for JTS Transactions
In a default installation of JBoss EAP, the ORB support for transactions is disabled. You can configure ORB settings in the iiop-openjdk
subsystem using the management CLI or the management console.
The iiop-openjdk
subsystem is available when using the full or full-ha profile in a managed domain, or the standalone-full.xml
or standalone-full-ha.xml
configuration file for a standalone server.
For a listing of the available configuration options for the iiop-openjdk
subsystem, see IIOP Subsystem Attributes.
Configure the ORB Using the Management CLI
You can configure each aspect of the ORB using the management CLI. This is the minimum configuration for the ORB to be used with JTS.
The following management CLI commands are configured for a managed domain using the full
profile. If necessary, change the profile to suit the one you need to configure. If you are using a standalone server, omit the /profile=full
portion of the commands.
Enable the Security Interceptors
Enable the security
attribute by setting the value to identity
.
/profile=full/subsystem=iiop-openjdk:write-attribute(name=security,value=identity)
Enable Transactions in the IIOP Subsystem
To enable the ORB for JTS, set the value of transactions
attribute to full
, rather than the default spec
.
/profile=full/subsystem=iiop-openjdk:write-attribute(name=transactions, value=full)
Enable JTS in the Transactions Subsystem
/profile=full/subsystem=transactions:write-attribute(name=jts,value=true)
For JTS activation, the server must be restarted as reload is not enough.
Configure the ORB Using the Management Console
- Select the Configuration tab from the top of the management console.
- Select Subsystems. In a managed domain, you will need to select the appropriate profile first.
- Select the IIOP subsystem and click View.
- Click the Edit button and modify the attributes as needed. Click on the Need Help? link for detailed explanations of each field.
- Click Save to save the changes.
Chapter 16. Java Connector Architecture (JCA) Management
16.1. About the Java Connector Architecture (JCA)
The Java EE Connector Architecture (JCA) defines a standard architecture for Java EE systems to external heterogeneous Enterprise Information Systems (EIS). Examples of EISs include Enterprise Resource Planning (ERP) systems, mainframe transaction processing (TP), databases, and messaging systems. A resource adapter is a component that implements the Java EE Connector API architecture.
JCA 1.7 provides features for managing:
- connections
- transactions
- security
- life-cycle
- work instances
- transaction inflow
- message inflow
JCA 1.7 was developed under the Java Community Process as JSR-322.
16.2. About Resource Adapters
A resource adapter is a deployable Java EE component that provides communication between a Java EE application and an Enterprise Information System (EIS) using the Java Connector Architecture (JCA) specification. A resource adapter is often provided by EIS vendors to allow easy integration of their products with Java EE applications.
An Enterprise Information System can be any other software system within an organization. Examples include Enterprise Resource Planning (ERP) systems, database systems, e-mail servers and proprietary messaging systems.
A resource adapter is packaged in a Resource Adapter Archive (RAR) file which can be deployed to JBoss EAP. A RAR file may also be included in an Enterprise Archive (EAR) deployment.
16.3. Configuring the JCA Subsystem
The jca
subsystem controls the general settings for the JCA container and resource adapter deployments. You can configure the jca
subsystem using the management console or the management CLI.
The main JCA elements to configure are:
- Configure JCA settings from the management console
The
jca
subsystem can be configured from the management console by navigating to Configuration → Subsystems → JCA. Then, select the appropriate tab:- Common Config - Contains settings for the cached connection manager, archive validation, and bean validation. Each of these is contained in their own tab as well. Modify these settings by opening the appropriate tab and clicking the Edit button.
- Bootstrap Contexts - Contains the list of configured bootstrap contexts. New bootstrap context objects can be added, removed, and configured. Each bootstrap context must be assigned a work manager.
Work Manager - Contains the list of configured work managers. New work managers can be added, removed, and their thread pools configured here. Each work manager can have one short-running thread pool and an optional long-running thread pool.
The thread pool attributes can be configured by clicking View on the selected work manager.
- Configure JCA settings from the management CLI
-
The
jca
subsystem can be configured from the management CLI from the/subsystem=jca
address. In a managed domain, you must precede the command with/profile=PROFILE_NAME
.
Archive Validation
This determines whether archive validation will be performed on the deployment units. The following table describes the attributes you can set for archive validation.
Table 16.1. Archive Validation Attributes
Attribute | Default Value | Description |
---|---|---|
enabled | true | Specifies whether archive validation is enabled. |
fail-on-error | true | Specifies whether an archive validation error report fails the deployment. |
fail-on-warn | false | Specifies whether an archive validation warning report fails the deployment. |
If an archive does not implement the JCA specification correctly and archive validation is enabled, an error message will display during deployment describing the problem. For example:
Severity: ERROR Section: 19.4.2 Description: A ResourceAdapter must implement a "public int hashCode()" method. Code: com.mycompany.myproject.ResourceAdapterImpl Severity: ERROR Section: 19.4.2 Description: A ResourceAdapter must implement a "public boolean equals(Object)" method. Code: com.mycompany.myproject.ResourceAdapterImpl
If archive validation is not specified, it is considered present and the enabled
attribute defaults to true
.
Bean Validation
This setting determines whether bean validation (JSR-303) will be performed on the deployment units. The following table describes the attributes you can set for bean validation.
Table 16.2. Bean Validation Attributes
Attribute | Default Value | Description |
---|---|---|
enabled | true | Specifies whether bean validation is enabled. |
If bean validation is not specified, it is considered present and the enabled
attribute defaults to true
.
Work Managers
There are two types of work managers:
- Default work manager
- The default work manager and its thread pools.
- Custom work manager
- A custom work manager definition and its thread pools.
The following table describes the attributes you can set for work managers.
Table 16.3. Work Manager Attributes
Attribute | Description |
---|---|
name | Specifies the name of the work manager. |
short-running-threads | Thread pool for standard Work instances. Each work manager has one short-running thread pool. |
long-running-threads |
Thread pool for JCA 1.7 Work instances that set the |
The following table describes the attributes you can set for work manager thread pools.
Table 16.4. Thread Pool Attributes
Attribute | Default Value | Description |
---|---|---|
name | default | Specifies the name of the thread pool. |
keepalive-time | 10 seconds | Specifies the amount of time that pool threads should be kept after doing work. |
allow-core-timeout | false | Boolean setting that determines whether core threads may time out. The default value is false. |
thread-factory | Reference to the thread factory. | |
max-thread | 50 | The maximum thread pool size. |
core-threads | 50 | The core thread pool size. This must be equal to or smaller than the maximum thread pool size. |
queue-length | 50 | The maximum queue length. |
Bootstrap Contexts
This is used to define custom bootstrap contexts. The following table describes the attributes you can set for bootstrap contexts.
Table 16.5. Bootstrap Context Attributes
Attribute | Description |
---|---|
name | Specifies the name of the bootstrap context. |
workmanager | Specifies the name of the work manager to use for this context. |
Cached Connection Manager
This is used for debugging connections and supporting lazy enlistment of a connection in a transaction, tracking whether they are used and released properly by the application. The following table describes the attributes you can set for the cached connection manager.
Table 16.6. Cached Connection Manager Attributes
Attribute | Default Value | Description |
---|---|---|
debug | false | Outputs warning on failure to explicitly close connections. |
error | false | Throws exception on failure to explicitly close connections. |
ignore-unknown-connections | false | Specifies that unknown connections will not be cached. |
16.4. Configuring Resource Adapters
16.4.1. Deploy a Resource Adapter
Resource adapters can be deployed just like other deployments using the management CLI or the management console. When running a standalone server, you can also copy the archive to the deployments directory to be picked up by the deployment scanner.
Deploy a Resource Adapter using the Management CLI
To deploy the resource adapter to a standalone server, enter the following management CLI command.
deploy /path/to/resource-adapter.rar
To deploy the resource adapter to all server groups in a managed domain, enter the following management CLI command.
deploy /path/to/resource-adapter.rar --all-server-groups
Deploy a Resource Adapter using the Management Console
- Log in to the management console and click on the Deployments tab.
- Click Add. In a managed domain, you will first need to select Content Repository.
- Choose the Upload a new deployment option and click Next.
- Browse to the resource adapter archive and click Next.
- Verify the upload, then click Finish.
- In a managed domain, assign the deployment to the appropriate server groups and enable the deployment.
Deploy a Resource Adapter Using the Deployment Scanner
To deploy a resource adapter manually to a standalone server, copy the resource adapter archive to the server deployments directory, for example, EAP_HOME/standalone/deployments/
. This will be picked up and deployed by the deployment scanner.
This option is not available for managed domains. You must use either the management console or the management CLI to deploy the resource adapter to server groups.
16.4.2. Configure a Resource Adapter
You can configure resource adapters using the management interfaces. The below example shows how to configure a resource adapter using the management CLI. See your resource adapter vendor’s documentation for supported properties and other important information.
Add the Resource Adapter Configuration
Add the resource adapter configuration.
/subsystem=resource-adapters/resource-adapter=eis.rar:add(archive=eis.rar, transaction-support=XATransaction)
Configure the Resource Adapter Settings
Configure any of the following settings as necessary.
Configure
config-properties
.Add the
server
configuration property./subsystem=resource-adapters/resource-adapter=eis.rar/config-properties=server:add(value=localhost)
Add the
port
configuration property./subsystem=resource-adapters/resource-adapter=eis.rar/config-properties=port:add(value=9000)
Configure
admin-objects
.Add an admin object.
/subsystem=resource-adapters/resource-adapter=eis.rar/admin-objects=aoName:add(class-name=com.acme.eis.ra.EISAdminObjectImpl, jndi-name=java:/eis/AcmeAdminObject)
Configure an admin object configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/admin-objects=aoName/config-properties=threshold:add(value=10)
Configure
connection-definitions
.Add a connection definition for a managed connection factory.
/subsystem=resource-adapters/resource-adapter=eis.rar/connection-definitions=cfName:add(class-name=com.acme.eis.ra.EISManagedConnectionFactory, jndi-name=java:/eis/AcmeConnectionFactory)
Configure a managed connection factory configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/connection-definitions=cfName/config-properties=name:add(value=Acme Inc)
Configure whether to record the enlistment trace. You can disable the recording of enlistment traces by setting the
enlistment-trace
attribute tofalse
./subsystem=resource-adapters/resource-adapter=eis.rar/connection-definitions=cfName:write-attribute(name=enlistment-trace,value=false)
WarningDisabling the enlistment trace will make tracking down errors during transaction enlistment more difficult.
See Resource Adapter Attributes for all available configuration options for resource adapters.
Activate the Resource Adapter
Activate the resource adapter.
/subsystem=resource-adapters/resource-adapter=eis.rar:activate
You can also define capacity policies for resource adapters. For more details, see the Capacity Policies section.
16.4.3. Deploy and Configure the Websphere MQ Resource Adapter
You can find the instructions for deploying the Websphere MQ resource adapter in Configuring Messaging for JBoss EAP.
16.4.4. Deploy and Configure the Generic JMS Resource Adapter
You can find the instructions for configuring the generic JMS resource adapter in Configuring Messaging for JBoss EAP.
16.5. Configure Managed Connection Pools
JBoss EAP provides three implementations of the ManagedConnectionPool
interface.
org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedQueueManagedConnectionPool
- This is the default connection pool in JBoss EAP 7 and provides the best out-of-the-box performance.
org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool
- This was the default connection pool in previous JBoss EAP versions.
org.jboss.jca.core.connectionmanager.pool.mcp.LeakDumperManagedConnectionPool
- This connection pool is used for debugging purposes only and will report any leaks upon shutdown or when the pool is flushed.
You can set the managed connection pool implementation for a datasource using the following management CLI command.
/subsystem=datasources/data-source=DATA_SOURCE:write-attribute(name=mcp,value=MCP_CLASS)
You can set the managed connection pool implementation for a resource adapter using the following management CLI command.
/subsystem=resource-adapters/resource-adapter=RESOURCE_ADAPTER/connection-definitions=CONNECTION_DEFINITION:write-attribute(name=mcp,value=MCP_CLASS)
You can set the managed connection pool implementation for a messaging server using the following management CLI command.
/subsystem=messaging-activemq/server=SERVER/pooled-connection-factory=CONNECTION_FACTORY:write-attribute(name=managed-connection-pool,value=MCP_CLASS)
16.6. View Connection Statistics
You can read statistics for a defined connection from the /deployment=NAME.rar
subtree. This is so that you can access statistics for any RAR, even if it not defined in a standalone.xml
or domain.xml
configuration.
/deployment=NAME.rar/subsystem=resource-adapters/statistics=statistics/connection-definitions=java\:\/testMe:read-resource(include-runtime=true)
Be sure to specify the include-runtime=true
argument, as all statistics are runtime-only information.
See Resource Adapter Statistics for information on the available statistics.
Chapter 17. Configuring the Web Server (Undertow)
17.1. Undertow Subsystem Overview
In JBoss EAP 7, the undertow
subsystem takes the place of the web
subsystem from previous versions of JBoss EAP.
The undertow
subsystem allows you to configure the web server and servlet container settings. It implements the Java Servlet 3.1 Specification as well as websockets and supports HTTP Upgrade and using high performance non-blocking handlers in servlet deployments. The undertow
subsystem also has the ability to act as a high performance reverse proxy which supports mod_cluster.
Within the undertow
subsystem, there are five main components to configure:
While JBoss EAP does offer the ability to update the configuration for each of these components, the default configuration is suitable for most use cases and provides reasonable performance settings.
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> <server name="default-server"> <http-listener name="default" socket-binding="http" redirect-socket="https"/> <host name="default-host" alias="localhost"> <location name="/" handler="welcome-content"/> <filter-ref name="server-header"/> <filter-ref name="x-powered-by-header"/> </host> </server> <servlet-container name="default"> <jsp-config/> <websockets/> </servlet-container> <handlers> <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/> </handlers> <filters> <response-header name="server-header" header-name="Server" header-value="JBoss-EAP/7"/> <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/> </filters> </subsystem>
The undertow
subsystem also relies on the io
subsystem to provide XNIO workers and buffer pools. The io
subsystem is configured separately and provides a default configuration which should give optimal performance in most cases.
Compared to the web
subsystem in previous JBoss EAP releases, the undertow
subsystem in JBoss EAP 7 has different default behaviors of HTTP methods.
17.2. Configuring Buffer Caches
The buffer cache is used to cache static resources. JBoss EAP enables multiple caches to be configured and referenced by deployments, allowing different deployments to use different cache sizes. Buffers are allocated in regions and are a fixed size. The total amount of space used can be calculated by multiplying the buffer size by the number of buffers per region by the maximum number of regions. The default size of a buffer cache is 10MB.
JBoss EAP provides a single cache by default:
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> .... </subsystem>
Updating an Existing Buffer Cache
To update an existing buffer cache:
/subsystem=undertow/buffer-cache=default/:write-attribute(name=buffer-size,value=2048)
reload
Creating a New Buffer Cache
To create a new buffer cache:
/subsystem=undertow/buffer-cache=new-buffer:add
Deleting a Buffer Cache
To delete a buffer cache:
/subsystem=undertow/buffer-cache=new-buffer:remove
reload
For a full list of the attributes available for configuring buffer caches, please see the Undertow Subsystem Attributes section.
17.3. Configuring a Server
A server represents an instance of Undertow and consists of several elements:
- host
- http-listener
- https-listener
- ajp-listener
The host element provides a virtual host configuration while the three listeners provide connections of that type to the Undertow instance.
Multiple servers may be configured, which allow deployments and servers to be completely isolated. This may be useful in certain scenarios such as multi-tenant environments
JBoss EAP provides a server by default:
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> <server name="default-server"> <http-listener name="default" socket-binding="http" redirect-socket="https"/> <host name="default-host" alias="localhost"> <location name="/" handler="welcome-content"/> <filter-ref name="server-header"/> <filter-ref name="x-powered-by-header"/> </host> </server> ... </subsystem>
Updating an Existing Server
To update an existing server:
/subsystem=undertow/server=default-server:write-attribute(name=default-host,value=default-host)
reload
Creating a New Server
To create a new server:
/subsystem=undertow/server=new-server:add
reload
Deleting a Server
To delete a server:
/subsystem=undertow/server=new-server:remove
reload
For a full list of the attributes available for configuring servers, see the Undertow Subsystem Attributes section.
17.4. Configuring a Servlet Container
A servlet container provides all servlet, JSP and websocket-related configuration, including session-related configuration. While most servers will only need a single servlet container, it is possible to configure multiple servlet containers by adding an additional servlet-container element. Having multiple servlet containers enables behavior such as allowing multiple deployments to be deployed to the same context path on different virtual hosts.
Much of the configuration provided in by servlet container can be individually overridden by deployed applications using their web.xml
file.
JBoss EAP provides a servlet container by default:
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> <server name="default-server"> ... </server> <servlet-container name="default"> <jsp-config/> <websockets/> </servlet-container> ... </subsystem>
Updating an Existing Servlet Container
To update an existing servlet container:
/subsystem=undertow/servlet-container=default:write-attribute(name=ignore-flush,value=true)
reload
Creating a New Servlet Container
To create a new servlet container:
/subsystem=undertow/servlet-container=new-servlet-container:add
reload
Deleting a Servlet Container
To delete a servlet container:
/subsystem=undertow/servlet-container=new-servlet-container:remove
reload
For a full list of the attributes available for configuring servlet containers, see the Undertow Subsystem Attributes section.
17.5. Configuring Handlers
JBoss EAP allows for two types of handlers to be configured:
- file handlers
- reverse-proxy handlers
File handlers serve static files. Each file handler must be attached to a location in a virtual host. Reverse-proxy handlers allow JBoss EAP to serve as a high performance reverse-proxy.
JBoss EAP provides a file handler by default:
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> <server name="default-server"> ... </server> <servlet-container name="default"> ... </servlet-container> <handlers> <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/> </handlers> ... </subsystem>
Using WebDAV for Static Resources
Previous versions of JBoss EAP allowed for using WebDAV with the web
subsystem, by way of the WebdavServlet
, to host static resources and enable additional HTTP methods for accessing and manipulating those files. In JBoss EAP 7, the undertow
subsystem does provide a mechanism for serving static files using a file handler, but the undertow
subsystem does not support WebDAV. If you want to use WebDAV with JBoss EAP 7, you can write a custom WebDAV servlet.
Updating an Existing File Handler
To update an existing file handler:
/subsystem=undertow/configuration=handler/file=welcome-content:write-attribute(name=case-sensitive,value=true)
reload
Creating a New File Handler
To create a new file handler:
/subsystem=undertow/configuration=handler/file=new-file-handler:add(path="${jboss.home.dir}/welcome-content")
Deleting a File Handler
To delete a file handler
/subsystem=undertow/configuration=handler/file=new-file-handler:remove
reload
For a full list of the attributes available for configuring handlers, see the Undertow Subsystem Attributes section.
17.6. Configuring Filters
A filter enables some aspect of a request to be modified and can use predicates to control when a filter executes. Some common use cases for filters include setting headers or doing GZIP compression.
A filter is functionally equivalent to a global valve used in previous versions of JBoss EAP.
The following types of filters can be defined:
- custom-filter
- error-page
- expression-filter
- gzip
- mod-cluster
- request-limit
- response-header
- rewrite
JBoss EAP provides two filters by default:
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> <buffer-cache name="default"/> <server name="default-server"> ... </server> <servlet-container name="default"> ... </servlet-container> <handlers> ... </handlers> <filters> <response-header name="server-header" header-name="Server" header-value="JBoss-EAP/7"/> <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/> </filters> </subsystem>
Updating an Existing Filter
To update an existing filter:
/subsystem=undertow/configuration=filter/response-header=server-header:write-attribute(name=header-value,value="JBoss-EAP")
reload
Creating a New Filter
To create a new filter:
/subsystem=undertow/configuration=filter/response-header=new-response-header:add(header-name=new-response-header,header-value="My Value")
Deleting a Filter
To delete a filter:
/subsystem=undertow/configuration=filter/response-header=new-response-header:remove
reload
For a full list of the attributes available for configuring filters, see the Undertow Subsystem Attributes section.
17.7. Configure the Default Welcome Web Application
JBoss EAP includes a default Welcome
application, which displays at the root context on port 8080 by default.
There is a default server preconfigured in Undertow that serves up the welcome content.
Default Undertow Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:undertow:3.1"> ... <server name="default-server"> <http-listener name="default" socket-binding="http" redirect-socket="https"/> <host name="default-host" alias="localhost"> <location name="/" handler="welcome-content"/> <filter-ref name="server-header"/> <filter-ref name="x-powered-by-header"/> </host> </server> ... <handlers> <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/> </handlers> ... </subsystem>
The default server (default-server
) has a default host (default-host
) configured. The default host is configured to handle requests to the server’s root, using the <location>
element, with the welcome-content
file handler. The welcome-content
handler serves up the content in the location specified in the path
property.
This default Welcome
application can be replaced with your own web application. This can be configured in one of two ways:
You can also disable the welcome content.
Changing the welcome-content File Handler
Modify the existing welcome-content
file handler’s path to point to the new deployment.
/subsystem=undertow/configuration=handler/file=welcome-content:write-attribute(name=path,value="/path/to/content")
Alternatively, you could create a different file handler to be used by the server’s root.
/subsystem=undertow/configuration=handler/file=NEW_FILE_HANDLER:add(path="/path/to/content") /subsystem=undertow/server=default-server/host=default-host/location=\/:write-attribute(name=handler,value=NEW_FILE_HANDLER)
Reload the server for the changes to take effect.
reload
Changing the default-web-module
Map a deployed web application to the server’s root.
/subsystem=undertow/server=default-server/host=default-host:write-attribute(name=default-web-module,value=hello.war)
Reload the server for the changes to take effect.
reload
Disabling the Default Welcome Web Application
Disable the welcome application by removing the location
entry (/
) for the default-host
.
/subsystem=undertow/server=default-server/host=default-host/location=\/:remove
Reload the server for the changes to take effect.
reload
17.8. Configuring HTTPS
For more details on configuring HTTPS for use with both web applications as well as the management interfaces please see the How to Configure Server Security Guide.
17.9. Configuring HTTP Session Timeout
The HTTP session timeout defines the period of inactive time needed to declare an HTTP session invalid. For example, a user accesses an application deployed to JBoss EAP which creates an HTTP session. If that user then attempts to access that application again after the HTTP session timeout, the original HTTP session will be invalidated and the user will be forced to create a new HTTP session. This may result in the loss of unpersisted data or the user having to re-authenticate.
The HTTP session timeout is configured in an application’s web.xml
file, but a default HTTP session timeout can be specified within JBoss EAP. The server’s timeout value will apply to all deployed applications, but an application’s web.xml
will override the server’s value.
The server value is specified in the default-session-timeout property which is found in the servlet-container section of the undertow
subsystem. The value of default-session-timeout is specified in minutes and the default 30.
Configuring the Default Session Timeout
To configure the default-session-timeout:
/subsystem=undertow/servlet-container=default:write-attribute(name=default-session-timeout, value=60)
reload
Changing the HTTP session timeout requires that all affected JBoss EAP instances be restarted. Until that is done, the original HTTP session timeout value applies.
17.10. Configuring HTTP-Only Session Management Cookies
Session management cookies can be accessed by both HTTP APIs and non-HTTP APIs such as JavaScript. JBoss EAP offers the ability to send the HttpOnly header as part of the Set-Cookie response header to the client, usually a browser. In supported browsers, enabling this header tells the browser that it should prevent accessing session management cookies through non-HTTP APIs. Restricting session management cookies to only HTTP APIs can help to mitigate the threat of session cookie theft via cross-site scripting attacks. To enable this behavior, the http-only attribute should be set to true.
Using the HttpOnly header does not actually prevent cross-site scripting attacks by itself, it merely notifies the browser. The browser must also support HttpOnly for this behavior to take affect.
Using the http-only attribute only applies the restriction to session management cookies and not other browser cookies.
The http-only attribute is set in two places in the undertow
subsystem:
- In the servlet container as a session cookie setting
- In the host section of the server as a single sign-on property
Configuring host-only for the Servlet Container Session Cookie
To configure the host-only property for the servlet container session cookie:
/subsystem=undertow/servlet-container=default/setting=session-cookie:add
/subsystem=undertow/servlet-container=default/setting=session-cookie:write-attribute(name=http-only,value=true)
reload
Configuring host-only for the Host Single Sign-On
To configure the host-only property for the host single sign-on:
/subsystem=undertow/server=default-server/host=default-host/setting=single-sign-on:add
/subsystem=undertow/server=default-server/host=default-host/setting=single-sign-on:write-attribute(name=http-only,value=true)
reload
17.11. Configuring HTTP/2
Undertow allows for the use of the HTTP/2 standard, which reduces latency by compressing headers and multiplexing many streams over the same TCP connection. It also provides the ability for a server to push resources to the client before it has requested them, leading to faster page loads. Undertow is also compatible with SPDY, the predecessor to HTTP/2, in order to support clients that have not yet updated to the new specification.
HTTP/2 is supported as Technology Preview only for JBoss EAP 7.0 and will only work with browsers that also support the HTTP/2 standard.
Using HTTP/2 requires the use of Java 8 as well as setting up ALPN on the classpath. This is due to the fact that HTTP/2 requires a TLS stack that supports ALPN, which is not provided by the default installation of Java 8.
17.11.1. Configuring Undertow to use HTTP/2
To configure Undertow to use HTTP/2, the following must be done:
Configure Undertow to use HTTPS
Please see the How to Configure Server Security Guide for configuring Undertow to use HTTPS for web applications.
It is possible to use HTTP/2 without using HTTPS, in other words, only plain HTTP using HTTP upgrade. In that case, you do not need to install ALPN and can simply enable HTTP/2 in Undertow:
/subsystem=undertow/server=default-server/http-listener=default:write-attribute(name=enable-http2,value=true)
Download the ALPN JAR
Start by determining the specific version of Java you have. Run the following command from the terminal to print the version of Java you have installed:
java -version
Based on your version, consult this page to determine the correct version of the ALPN JAR to download from this page. For example, if you were running Java version 1.8.0_51
, you would use ALPN version 8.1.4.v20150727
and download alpn-boot-8.1.4.v20150727.jar
.
Add the ALPN JAR to the Boot Classpath
Once you have downloaded the correct version of the ALPN JAR, copy it to EAP_HOME/bin
. You also must add the following to bin/standalone.conf
(or bin/domain.conf
if running in a managed domain) replacing $JBOSS_HOME
and $ALPN_VERSION
with the appropriate values.
JAVA_OPTS="$JAVA_OPTS -Xbootclasspath/p:$JBOSS_HOME/bin/alpn-boot-$ALPN_VERSION.jar"
You must restart JBoss EAP for the classpath changes to take affect.
Enable HTTP/2 in the HTTPS Listener
To enable the HTTPS listener in Undertow to use HTTP/2, you must set the enable-http2 attribute to true:
/subsystem=undertow/server=default-server/https-listener=https:write-attribute(name=enable-http2,value=true)
Verify HTTP/2 is Being Used
To verify that Undertow is using HTTP/2, you will need to inspect the headers coming from Undertow. Navigate to your JBoss EAP instance using https, for example https://localhost:8443, and use your browser’s developer tools to inspect the headers. Some browsers, for example Google Chrome, will show HTTP/2 pseudo headers (:path, :authority, :method and :scheme) when using HTTP/2, while other browsers, for example Firefox and Safari, will report the status or version of the header as HTTP/2.0.
17.12. Configuring a RequestDumping Handler
The RequestDumping handler (io.undertow.server.handlers.RequestDumpingHandler) logs the details of a request and corresponding response objects handled by Undertow within JBoss EAP.
While this handler can be useful for debugging, it may also log sensitive information. Please keep this in mind when enabling this handler.
The RequestDumping handler replaces the RequestDumperValve from previous versions of JBoss EAP.
You can configure a RequestDumping handler at either at the server level directly in JBoss EAP or within an individual application.
17.12.1. Configuring a RequestDumping Handler on the Server
A RequestDumping handler should be configured as an expression filter. To configure a RequestDumping handler as an expression filter, you need to do the following:
Create a new Expression Filter with the RequestDumping Handler
/subsystem=undertow/configuration=filter/expression-filter=requestDumperExpression:add(expression="dump-request")
Enable the Expression Filter in the Undertow Web Server
/subsystem=undertow/server=default-server/host=default-host/filter-ref=requestDumperExpression:add
All requests and corresponding responses handled by the Undertow web server will be logged when enabling the RequestDumping handler as a expression filter in this manner.
Configuring a RequestDumping Handler for Specific URLs
In addition to logging all requests, you can also use an expression filter to only log requests and corresponding responses for specific URLs. This can be accomplished using a predicate in your expression such as path, path-prefix, or path-suffix. For example, if you want to log all requests and corresponding responses to /myApplication/test, you can use the expression "path(/myApplication/test) -> dump-request"
instead of the expression "dump-request"
when creating your expression filter. This will only direct requests with a path exactly matching /myApplication/test to the RequestDumping handler.
17.12.2. Configuring a RequestDumping Handler within an Application
In addition to configuring a RequestDumping handler at the server, you can also configure it within individual applications. This will limit the scope of the handler to only that specific application. A RequestDumping handler should be configured in WEB-INF/undertow-handlers.conf
.
To configure the RequestDumping handler in WEB-INF/undertow-handlers.conf
to log all requests and corresponding responses for this application, add the following expression to WEB-INF/undertow-handlers.conf
:
Example WEB-INF/undertow-handlers.conf
dump-request
To configure the RequestDumping handler in WEB-INF/undertow-handlers.conf
to only log requests and corresponding responses to specific URLs within this application, you can use a predicate in your expression such as path, path-prefix, or path-suffix. For example, to log all requests and corresponding responses to test
in your application, the following expression with the path predicate could be used:
Example WEB-INF/undertow-handlers.conf
path(/test) -> dump-request
When using the predicates such as path, path-prefix, or path-suffix in expressions defined in the application’s WEB-INF/undertow-handlers.conf
, the value used will be relative to the context root of the application. For example, if the application’s context root is myApplication with an expression path(/test) -> dump-request
configured in WEB-INF/undertow-handlers.conf
, it will only log requests and corresponding responses to /myApplication/test.
Chapter 18. Configuring Remoting
18.1. About the Remoting Subsystem
The remoting
subsystem allows you to configure inbound and outbound connections for local and remote services as well as the settings for those connections.
JBoss Remoting includes the following configurable elements: the endpoint, connectors, and a series of local and remote connection URIs. Most people will not need to configure the remoting
subsystem at all, unless they use custom connectors for their own applications. Applications that act as remoting clients, such as EJBs, need separate configuration to connect to a specific connector.
Default Remoting Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:remoting:3.0"> <endpoint/> <http-connector name="http-remoting-connector" connector-ref="default" security-realm="ApplicationRealm"/> </subsystem>
See Remoting Subsystem Attributes for a full list of the attributes available for the remoting
subsystem.
The Remoting Endpoint
The remoting endpoint uses the XNIO worker declared and configured by the io
subsystem.
See Configuring the Endpoint for details on how to configure the remoting endpoint.
Connector
The connector is the main remoting configuration element. Multiple connectors are allowed. Each connector consists of a <connector>
element with several sub-elements, and few other attributes. The default connector is used by several JBoss EAP subsystems. Specific settings for the elements and attributes of your custom connectors depend on your applications. Contact Red Hat Global Support Services for more information.
See Configuring a Connector for details on how to configure connectors.
Outbound Connections
You can specify three different types of outbound connections:
- An outbound connection, specified by a URI
- A local outbound connection, which connects to a local resource such as a socket
- A remote outbound connection, which connects to a remote resource and authenticates using a security realm
Additional Configuration
Remoting depends on several elements that are configured outside of the remoting
subsystem, such as the network interface and IO worker.
For more information, see Additional Remoting Configuration.
18.2. Configuring the Endpoint
In JBoss EAP 6, the worker thread pool was configured directly in the remoting
subsystem. In JBoss EAP 7, the remoting endpoint
configuration references a worker from the io
subsystem.
JBoss EAP provides the following endpoint
configuration by default.
<subsystem xmlns="urn:jboss:domain:remoting:3.0"> <endpoint/> ... </subsystem>
Updating the Existing Endpoint Configuration
/subsystem=remoting/configuration=endpoint:write-attribute(name=authentication-retries,value=2)
reload
Creating a New Endpoint Configuration
/subsystem=remoting/configuration=endpoint:add
Deleting an Endpoint Configuration
/subsystem=remoting/configuration=endpoint:remove
reload
See Endpoint Attributes for a full list of the attributes available for the endpoint configuration.
18.3. Configuring a Connector
The connector is the main configuration element relating to remoting and contains several sub-elements for additional configuration.
Updating the Existing Connector Configuration
/subsystem=remoting/connector=new-connector:write-attribute(name=socket-binding,value=my-socket-binding)
reload
Creating a New Connector
/subsystem=remoting/connector=new-connector:add(socket-binding=my-socket-binding)
Deleting a Connector
/subsystem=remoting/connector=new-connector:remove
reload
For a full list of the attributes available for configuring a connector, please see the Remoting Subsystem Attributes section.
18.4. Configuring an HTTP Connector
The HTTP connector provides the configuration for the HTTP upgrade-based remoting connector. JBoss EAP provides the following http-connector
configuration by default.
<subsystem xmlns="urn:jboss:domain:remoting:3.0"> ... <http-connector name="http-remoting-connector" connector-ref="default" security-realm="ApplicationRealm"/> </subsystem>
By default, this HTTP connector connects to an HTTP listener named default
that is configured in the undertow
subsystem. For more information, see Configuring the Web Server (Undertow).
Updating the Existing HTTP Connector Configuration
/subsystem=remoting/http-connector=new-connector:write-attribute(name=connector-ref,value=new-connector-ref)
reload
Creating a New HTTP Connector
/subsystem=remoting/http-connector=new-connector:add(connector-ref=default)
Deleting an HTTP Connector
/subsystem=remoting/http-connector=new-connector:remove
See Connector Attributes for a full list of the attributes available for configuring an HTTP connector.
18.5. Configuring an Outbound Connection
An outbound connection is a generic remoting outbound connection that is fully specified by a URI.
Updating an Existing Outbound Connection
/subsystem=remoting/outbound-connection=new-outbound-connection:write-attribute(name=uri,value=http://example.com)
Creating a New Outbound Connection
/subsystem=remoting/outbound-connection=new-outbound-connection:add(uri=http://example.com)
Deleting an Outbound Connection
/subsystem=remoting/outbound-connection=new-outbound-connection:remove
See Outbound Connection Attributes for a full list of the attributes available for configuring an outbound connection.
18.6. Configuring a Remote Outbound Connection
A remote outbound connection is specified by a protocol, an outbound socket binding, a username and a security realm. The protocol can be either remote
, http-remoting
or https-remoting
.
Updating an Existing Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outbound-connection:write-attribute(name=outbound-socket-binding-ref,value=outbound-socket-binding)
Creating a New Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outbound-connection:add(outbound-socket-binding-ref=outbound-socket-binding)
Deleting a Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outbound-connection:remove
See Remote Outbound Connection Attributes for a full list of the attributes available for configuring a remote outbound connection.
18.7. Configuring a Local Outbound Connection
A local outbound connection is a remoting outbound connection with a protocol of local
, specified only by an outbound socket binding.
Updating an Existing Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outbound-connection:write-attribute(name=outbound-socket-binding-ref,value=outbound-socket-binding)
Creating a New Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outbound-connection:add(outbound-socket-binding-ref=outbound-socket-binding)
Deleting a Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outbound-connection:remove
See Local Outbound Connection Attributes for a full list of the attributes available for configuring a local outbound connection.
18.8. Additional Remoting Configuration
There are several remoting elements that are configured outside of the remoting
subsystem.
- IO worker
Use the following command to set the IO worker for remoting:
/subsystem=remoting/configuration=endpoint:write-attribute(name=worker, value=WORKER_NAME)
See Configuring a Worker for details on how to configure an IO worker.
- Network interface
The network interface used by the
remoting
subsystem is thepublic
interface. This interface is also used by several other subsystems, so exercise caution when modifying it.<interfaces> <interface name="management"> <inet-address value="${jboss.bind.address.management:127.0.0.1}"/> </interface> <interface name="public"> <inet-address value="${jboss.bind.address:127.0.0.1}"/> </interface> <interface name="unsecure"> <inet-address value="${jboss.bind.address.unsecure:127.0.0.1}"/> </interface> </interfaces>
In a managed domain, the
public
interface is defined per host in itshost.xml
file.- Socket binding
The default socket binding used by the
remoting
subsystem binds to port8080
.For more information about socket binding and socket binding groups, see Socket Bindings.
- Remoting connector reference for EJB
The
ejb3
subsystem contains a reference to the remoting connector for remote method invocations. The following is the default configuration:<remote connector-ref="remoting-connector" thread-pool-name="default"/>
- Secure transport configuration
Remoting transports use STARTTLS to use a secure connection, such as HTTPS, Secure Servlet, if the client requests it. The same socket binding (network port) is used for secured and unsecured connections, so no additional server-side configuration is necessary. The client requests the secure or unsecured transport, as its needs dictate. JBoss EAP components that use remoting, such as EJBs, ORB, and the JMS provider, request secured interfaces by default.
WarningSTARTTLS works by activating a secure connection if the client requests it, and otherwise defaults to an unsecured connection. It is inherently susceptible to a man-in-the-middle exploit, where an attacker intercepts the request of the client and modifies it to request an unsecured connection. Clients must be written to fail appropriately if they do not receive a secure connection, unless an unsecured connection is an appropriate fall-back.
Chapter 19. Configuring the IO Subsystem
19.1. IO Subsystem Overview
The io
subsystem defines the XNIO workers and buffer pools used by other subsystems, such as Undertow and Remoting. These workers and buffer pools are defined within the following components in the io
subsystem:
Default IO Subsystem Configuration
<subsystem xmlns="urn:jboss:domain:io:1.1"> <worker name="default"/> <buffer-pool name="default"/> </subsystem>
19.2. Configuring a Worker
Workers are XNIO worker instances. An XNIO worker instance is an abstraction layer for the Java NIO APIs, which provide functionality such as management of IO and worker threads as well as SSL support. By default, JBoss EAP provides single worker called default
, but more can be defined.
Updating an Existing Worker
To update an existing worker:
/subsystem=io/worker=default:write-attribute(name=io-threads,value=10)
reload
Creating a New Worker
To create a new worker:
/subsystem=io/worker=newWorker:add
Deleting a Worker
To delete a worker:
/subsystem=io/worker=newWorker:remove
reload
For a full list of the attributes available for configuring workers, please see the IO Subsystem Attributes section.
19.3. Configuring a Buffer Pool
Buffer Pools are pooled NIO buffer instances.
Changing the buffer size has a big impact on application performance. For most servers, the ideal size is usually 16k.
Updating an Existing Buffer Pool
To update an existing buffer pool:
/subsystem=io/buffer-pool=default:write-attribute(name=direct-buffers,value=true)
reload
Creating a Buffer Pool
To create a new buffer pool:
/subsystem=io/buffer-pool=newBuffer:add
Deleting a Buffer Pool
To delete a buffer pool:
/subsystem=io/buffer-pool=newBuffer:remove
reload
For a full list of the attributes available for configuring buffer pools, please see the IO Subsystem Attributes section.
Chapter 20. Configuring Batch Applications
JBoss EAP 7 introduced support for Java batch applications as defined by JSR-352. You can configure an environment for running batch applications and manage batch jobs using the batch-jberet
subsystem.
For information on developing batch applications, see Java Batch Application Development in the JBoss EAP Development Guide.
20.1. Configuring Batch Jobs
You can configure settings for batch jobs using the batch-jberet
subsystem, which is based on the JBeret implementation.
The default batch-jberet
subsystem configuration defines an in-memory job repository and default thread pool settings.
<subsystem xmlns="urn:jboss:domain:batch-jberet:1.0"> <default-job-repository name="in-memory"/> <default-thread-pool name="batch"/> <job-repository name="in-memory"> <in-memory/> </job-repository> <thread-pool name="batch"> <max-threads count="10"/> <keepalive-time time="30" unit="seconds"/> </thread-pool> </subsystem>
By default, any batch jobs stopped during a server suspend will be restarted upon server resume. You can set the restart-jobs-on-resume
property to false
to leave jobs in the STOPPED
state instead.
/subsystem=batch-jberet:write-attribute(name=restart-jobs-on-resume,value=false)
You can also configure the settings for batch job repositories and thread pools.
20.1.1. Configure Batch Job Repositories
This section shows you how to configure in-memory and JDBC job repositories for storing batch job information using the management CLI. You can also configure job repositories using the management console by navigating to the Batch subsystem from the Configuration tab and selecting either In Memory or JDBC from the left-hand menu.
Add an In-memory Job Repository
You can add a job repository that stores batch job information in memory.
/subsystem=batch-jberet/in-memory-job-repository=REPOSITORY_NAME:add
Add a JDBC Job Repository
You can add a job repository that stores batch job information in a database. You must specify the name of the datasource for connecting to the database.
/subsystem=batch-jberet/jdbc-job-repository=REPOSITORY_NAME:add(data-source=DATASOURCE)
Set a Default Job Repository
You can set an in-memory or JDBC job repository as the default job repository for batch applications.
/subsystem=batch-jberet:write-attribute(name=default-job-repository,value=REPOSITORY_NAME)
This will require a server reload.
reload
20.1.2. Configure Batch Thread Pools
This section shows you how to configure thread pools and thread factories to be used for batch jobs using the management CLI. You can also configure thread pools and thread factories using the management console by navigating to the Batch subsystem from the Configuration tab and selecting Thread Pools or Thread Factories from the left-hand menu.
Configure a Thread Pool
When adding a thread pool, you must specify the max-threads
, which should always be greater than 3
as two threads are reserved to ensure partition jobs can execute as expected.
Add a thread pool.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:add(max-threads=10)
If desired, set a
keepalive-time
value./subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:write-attribute(name=keepalive-time,value={time=60,unit=SECONDS})
Use a Thread Factory
Add a thread factory.
/subsystem=batch-jberet/thread-factory=THREAD_FACTORY_NAME:add
Configure the desired attributes for the thread factory.
-
group-name
- The name of a thread group to create for this thread factory. -
priority
- The thread priority of created threads. thread-name-pattern
- The template used to create names for threads. The following patterns may be used:-
%%
- A percent sign -
%t
- The per-factory thread sequence number -
%g
- The global thread sequence number -
%f
- The factory sequence number -
%i
- The thread ID
-
-
Assign the thread factory to a thread pool.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:write-attribute(name=thread-factory,value=THREAD_FACTORY_NAME)
This will require a server reload.
reload
Set a Default Thread Pool
You can set a different thread pool as the default thread pool.
/subsystem=batch-jberet:write-attribute(name=default-thread-pool,value=THREAD_POOL_NAME)
This will require a server reload.
reload
View Thread Pool Statistics
You can view runtime information about a batch thread pool using the read-resource
management CLI operation. You must use the include-runtime=true
parameter in order to see this runtime information.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:read-resource(include-runtime=true) { "outcome" => "success", "result" => { "active-count" => 0, "completed-task-count" => 0L, "current-thread-count" => 0, "keepalive-time" => undefined, "largest-thread-count" => 0, "max-threads" => 15, "name" => "THREAD_POOL_NAME", "queue-size" => 0, "rejected-count" => 0, "task-count" => 0L, "thread-factory" => "THREAD_FACTORY_NAME" } }
You can also view runtime information for batch thread pools using the management console by navigating to the Batch subsystem from the Runtime tab.
20.2. Managing Batch Jobs
The batch-jberet
subsystem resource for deployments allows you to start, stop, and restart batch jobs. You can also view the details of job executions.
Restart a Batch Job
You can restart a job that is in a STOPPED
or FAILED
state by providing its execution ID and optionally any properties to use when restarting the batch job.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:restart-job(execution-id=EXECUTION_ID,properties={PROPERTY=VALUE})
The execution ID must be the most recent execution of the job instance.
Start a Batch Job
You can start a batch job by providing the job XML file and optionally any properties to use when starting the batch job.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:start-job(job-xml-name=JOB_XML_NAME,properties={PROPERTY=VALUE})
Stop a Batch Job
You can stop a running batch job by providing its execution ID.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:stop-job(execution-id=EXECUTION_ID)
View Batch Job Execution Details
You can view the details of batch job executions. You must use the include-runtime=true
parameter in order to see this runtime information.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:read-resource(recursive=true,include-runtime=true) { "outcome" => "success", "result" => {"job" => {"import-file" => { "instance-count" => 2, "running-executions" => 0, "execution" => { "2" => { "batch-status" => "COMPLETED", "create-time" => "2016-04-11T22:03:12.708-0400", "end-time" => "2016-04-11T22:03:12.718-0400", "exit-status" => "COMPLETED", "instance-id" => 58L, "last-updated-time" => "2016-04-11T22:03:12.719-0400", "start-time" => "2016-04-11T22:03:12.708-0400" }, "1" => { "batch-status" => "FAILED", "create-time" => "2016-04-11T21:57:17.567-0400", "end-time" => "2016-04-11T21:57:17.596-0400", "exit-status" => "Error : org.hibernate.exception.ConstraintViolationException: could not execute statement", "instance-id" => 15L, "last-updated-time" => "2016-04-11T21:57:17.597-0400", "start-time" => "2016-04-11T21:57:17.567-0400" } } }}} }
Chapter 21. Configuring the Naming Subsystem
21.1. About the Naming Subsystem
The naming
subsystem provides the JNDI implementation for JBoss EAP. You can configure this subsystem to bind entries in global JNDI namespaces. You can also configure it to activate or deactivate the remote JNDI interface.
The following is an example of the naming
subsystem XML configuration example with all of the elements and attributes specified.
<subsystem xmlns="urn:jboss:domain:naming:2.0"> <bindings> <simple name="java:global/simple-integer-binding" value="100" type="int" /> <simple name="java:global/jboss.org/docs/url" value="https://docs.jboss.org" type="java.net.URL" /> <object-factory name="java:global/foo/bar/factory" module="org.foo.bar" class="org.foo.bar.ObjectFactory" /> <external-context name="java:global/federation/ldap/example" class="javax.naming.directory.InitialDirContext" cache="true"> <environment> <property name="java.naming.factory.initial" value="com.sun.jndi.ldap.LdapCtxFactory" /> <property name="java.naming.provider.url" value="ldap://ldap.example.com:389" /> <property name="java.naming.security.authentication" value="simple" /> <property name="java.naming.security.principal" value="uid=admin,ou=system" /> <property name="java.naming.security.credentials" value="secret" /> </environment> </external-context> <lookup name="java:global/new-alias-name" lookup="java:global/original-name" /> </bindings> <remote-naming/> </subsystem>
21.2. Configuring Global Bindings
The naming
subsystem allows you to bind entries into the java:global
, java:jboss
, or java
global JNDI namespaces; however, it is recommended that you use the standard portable java:global
namespace.
Global bindings are configured in the <bindings>
element of the naming
subsystem. Four types of bindings are supported:
Configuring Simple Bindings
The simple
XML configuration element binds primitive or java.net.URL
entries.
-
The
name
attribute is mandatory and specifies the target JNDI name for the entry. -
The
value
attribute is mandatory and defines the entry’s value. -
The optional
type
attribute, which defaults tojava.lang.String
, specifies the type of the entry’s value. In addition tojava.lang.String
, you can specify primitive types and their corresponding object wrapper classes, such asint
orjava.lang.Integer
, andjava.net.URL
.
The following is an example of a management CLI command that creates a simple binding.
/subsystem=naming/binding=java\:global\/simple-integer-binding:add(binding-type=simple, type=int, value=100)
Resulting XML Configuration
<subsystem xmlns="urn:jboss:domain:naming:2.0"> <bindings> <simple name="java:global/simple-integer-binding" value="100" type="int"/> </bindings> <remote-naming/> </subsystem>
Use the following command to remove the binding.
/subsystem=naming/binding=java\:global\/simple-integer-binding:remove
Binding Object Factories
The object-factory
XML configuration element binds javax.naming.spi.ObjectFactory
entries.
-
The
name
attribute is mandatory and specifies the target JNDI name for the entry. -
The
class
attribute is mandatory and defines the object factory’s Java type. -
The
module
attribute is mandatory and specifies the JBoss Module ID where the object factory Java class can be loaded from. -
The optional
environment
child element can be used to provide a custom environment to the object factory.
The following is an example of a management CLI command that creates an object factory binding.
/subsystem=naming/binding=java\:global\/foo\/bar\/factory:add(binding-type=object-factory, module=org.foo.bar, class=org.foo.bar.ObjectFactory, environment=[p1=v1, p2=v2])
Resulting XML Configuration
<subsystem xmlns="urn:jboss:domain:naming:2.0"> <bindings> <object-factory name="java:global/foo/bar/factory" module="org.foo.bar" class="org.foo.bar.ObjectFactory"> <environment> <property name="p1" value="v1" /> <property name="p2" value="v2" /> </environment> </object-factory> </bindings> </subsystem>
Use the following command to remove the binding.
/subsystem=naming/binding=java\:global\/foo\/bar\/factory:remove
Binding External Contexts
Federation of external JNDI contexts, such as LDAP context, are achieved using the external-context
XML configuration element.
-
The
name
attribute is mandatory and specifies the target JNDI name for the entry. -
The
class
attribute is mandatory and indicates the Java initial naming context type used to create the federated context. Note that such type must have a constructor with a single environment map argument. -
The optional
module
attribute specifies the JBoss Module ID where any classes required by the external JNDI context can be loaded from. -
The optional
cache
attribute, which defaults tofalse
, indicates whether the external context instance should be cached. -
The optional
environment
child element can be used to provide the custom environment needed to look up the external context.
The following is an example of a management CLI command that creates an external context binding.
/subsystem=naming/binding=java\:global\/federation\/ldap\/example:add(binding-type=external-context, cache=true, class=javax.naming.directory.InitialDirContext, module=org.jboss.as.naming, environment=[java.naming.factory.initial=com.sun.jndi.ldap.LdapCtxFactory, java.naming.provider.url="ldap://ldap.example.com:389", java.naming.security.authentication=simple, java.naming.security.principal="uid=admin,ou=system", java.naming.security.credentials=secret]
Resulting XML Configuration
<subsystem xmlns="urn:jboss:domain:naming:2.0"> <bindings> <external-context name="java:global/federation/ldap/example" module="org.jboss.as.naming" class="javax.naming.directory.InitialDirContext" cache="true"> <environment> <property name="java.naming.factory.initial" value="com.sun.jndi.ldap.LdapCtxFactory"/> <property name="java.naming.provider.url" value="ldap://ldap.example.com:389"/> <property name="java.naming.security.authentication" value="simple"/> <property name="java.naming.security.principal" value="uid=admin,ou=system"/> <property name="java.naming.security.credentials" value="secret"/> </environment> </external-context> </bindings> </subsystem>
Use the following command to remove the binding.
/subsystem=naming/binding=java\:global\/federation\/ldap\/example:remove
Resource look up for JNDI providers that do not properly implement the lookup(Name)
method can result in a "javax.naming.InvalidNameException: Only support CompoundName names" error.
You might be able to work around this issue by specifying that the external context environment use the lookup(String)
method instead by adding the following property; however, this can result in a performance degradation.
<property name="org.jboss.as.naming.lookup.by.string" value="true"/>
Binding Lookup Aliases
The lookup
element allows you to bind existing entries into additional names or aliases.
-
The
name
attribute is mandatory and specifies the target JNDI name for the entry. -
The
lookup
attribute is mandatory and indicates the source JNDI name.
The following is an example of a management CLI command that binds an existing entry to an alias.
/subsystem=naming/binding=java\:global\/new-alias-name:add(binding-type=lookup, lookup=java\:global\/original-name)
Resulting XML Configuration
<lookup name="java:global/new-alias-name" lookup="java:global/original-name" />
Use the following command to remove the binding.
/subsystem=naming/binding=java\:global\/c:remove
21.3. Configuring the Remote JNDI Interface
The remote JNDI interface allows clients to look up entries in remote JBoss EAP instances. The naming
subsystem can be configured to deactivate or activate this interface, which is activated by default. The remote JNDI interface is configured using the <remote-naming>
element.
Use the following management CLI command to activate or reactivate the remote JNDI interface.
/subsystem=naming/service=remote-naming:add
Use the following management CLI command to deactivate the remote JNDI interface.
/subsystem=naming/service=remote-naming:remove
Only entries within the java:jboss/exported
context are accessible over remote JNDI.
Chapter 22. Configuring High Availability
22.1. Introduction to High Availability
JBoss EAP provides the following high availability services to guarantee the availability of deployed Java EE applications.
- Load balancing
- This allows a service to handle a large number of requests by spreading the workload across multiple servers. A client can have timely responses from the service even in the event of a high volume of requests.
- Failover
- This allows a client to have uninterrupted access to a service even in the event of hardware or network failures. If the service fails, another cluster member takes over the client’s requests so that it can continue processing.
Clustering is a term that encompasses all of these capabilities. Members of a cluster can be configured to share workloads (load balancing) and pick up client processing in the event of a failure of another cluster member (failover).
It is important to keep in mind that the JBoss EAP operating mode chosen (standalone server or managed domain) pertains to how you want to manage your servers. High availability services can be configured in JBoss EAP regardless of its operating mode.
JBoss EAP supports high availability at several different levels using various components. Some of those components of the runtime and your applications that can be made highly-available are:
- Instances of the application server
- Web applications, when used in conjunction with the internal JBoss Web Server, Apache HTTP Server, Microsoft IIS, or Oracle iPlanet Web Server
- Stateful and stateless session Enterprise JavaBeans (EJBs)
- Single sign-on (SSO) mechanisms
- HTTP sessions
- JMS services and message-driven beans (MDBs)
- Singleton MSC services
- Singleton deployments
Clustering is made available to JBoss EAP by the jgroups
, infinispan
, and modcluster
subsystems. The ha and full-ha profiles have these systems enabled. In JBoss EAP, these services start up and shut down on demand, but they will only start up if an application configured as distributable is deployed on the servers.
See the JBoss EAP Development Guide for how to mark an application as distributable.
22.2. Cluster Communication with JGroups
22.2.1. About JGroups
JGroups is a toolkit for reliable messaging and can be used to create clusters whose nodes can send messages to each other.
The jgroups
subsystem provides group communication support for high availability services in JBoss EAP. It allows you to configure named channels and protocol stacks as well as view runtime statistics for channels. The jgroups
subsystem is available when using a configuration that provides high availability capabilities, such as the ha or full-ha profile in a managed domain, or the standalone-ha.xml
or standalone-full-ha.xml
configuration file for a standalone server.
JBoss EAP is preconfigured with two JGroups stacks:
- udp
- The nodes in the cluster use User Datagram Protocol (UDP) multicasting to communicate with each other. This is the default stack.
- tcp
- The nodes in the cluster use Transmission Control Protocol (TCP) to communicate with each other.
You can use the preconfigured stacks or define your own to suit your system’s specific requirements.
TCP has more overhead and is often considered slower than UDP since it handles error checking, packet ordering, and congestion control itself. JGroups handles these features for UDP, whereas TCP guarantees them itself. TCP is a good choice when using JGroups on unreliable or high congestion networks, or when multicast is not available.
22.2.2. Switch the Default JGroups Channel to Use TCP
By default, cluster nodes communicate using the UDP protocol. The default ee
JGroups channel uses the predefined udp
protocol stack.
<channels default="ee"> <channel name="ee" stack="udp"/> </channels> <stacks> <stack name="udp"> <transport type="UDP" socket-binding="jgroups-udp"/> <protocol type="PING"/> ... </stack> <stack name="tcp"> <transport type="TCP" socket-binding="jgroups-tcp"/> <protocol type="MPING" socket-binding="jgroups-mping"/> ... </stack> </stacks>
Some networks only allow TCP to be used. Use the following management CLI command to switch the ee
channel to use the preconfigured tcp
stack.
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcp)
This default tcp
stack uses the MPING
protocol, which uses IP multicast to discover the initial cluster membership. See the following sections for configuring stacks for alternative membership discovery protocols:
22.2.3. Configure TCPPING
This procedure creates a new JGroups stack that uses the TCPPING
protocol to define a static cluster membership list. A base script is provided that creates a tcpping
stack and sets the default ee
channel to use this new stack. The management CLI commands in this script must be customized for your environment and will be processed as a batch.
Copy the following script into a text editor and save it to the local file system.
batch # Add the tcpping stack /subsystem=jgroups/stack=tcpping:add /subsystem=jgroups/stack=tcpping/transport=TCP:add(socket-binding=jgroups-tcp) /subsystem=jgroups/stack=tcpping/protocol=TCPPING:add # Set the properties for the TCPPING protocol /subsystem=jgroups/stack=tcpping/protocol=TCPPING:write-attribute(name=properties,value={initial_hosts="HOST_A[7600],HOST_B[7600]",port_range=0,timeout=3000}) /subsystem=jgroups/stack=tcpping/protocol=MERGE3:add /subsystem=jgroups/stack=tcpping/protocol=FD_SOCK:add(socket-binding=jgroups-tcp-fd) /subsystem=jgroups/stack=tcpping/protocol=FD:add /subsystem=jgroups/stack=tcpping/protocol=VERIFY_SUSPECT:add /subsystem=jgroups/stack=tcpping/protocol=pbcast.NAKACK2:add /subsystem=jgroups/stack=tcpping/protocol=UNICAST3:add /subsystem=jgroups/stack=tcpping/protocol=pbcast.STABLE:add /subsystem=jgroups/stack=tcpping/protocol=pbcast.GMS:add /subsystem=jgroups/stack=tcpping/protocol=MFC:add /subsystem=jgroups/stack=tcpping/protocol=FRAG2:add # Set tcpping as the stack for the ee channel /subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcpping) run-batch reload
Note that the order of protocols defined is important.
Modify the script for your environment.
-
If you are running in a managed domain, you must specify which profile to update by preceding the
/subsystem=jgroups
commands with/profile=PROFILE_NAME
. Adjust the TCPPING properties, which are optional, for your environment:
-
initial_hosts
: A comma-separated list of the hosts, using the syntaxHOST[PORT]
, that are considered well-known and will be available to look up the initial membership. -
port_range
: If desired, you can assign a port range. If you assign a port range of2
, and the initial port for a host is7600
, then TCPPING will attempt to contact the host on ports7600
-7602
. The port range applies to each address specified ininitial_hosts
. -
timeout
: A timeout value, in milliseconds, for cluster members.
-
-
If you are running in a managed domain, you must specify which profile to update by preceding the
Run the script by passing the script file to the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect --file=/path/to/SCRIPT_NAME
The TCPPING stack is now available and TCP is used for network communication.
22.2.4. Configure TCPGOSSIP
This procedure creates a new JGroups stack that uses the TCPGOSSIP
protocol to use an external gossip router to discover the members of a cluster. A base script is provided that creates a tcpgossip
stack and sets the default ee
channel to use this new stack. The management CLI commands in this script must be customized for your environment and will be processed as a batch.
Copy the following script into a text editor and save it to the local file system.
batch # Add the tcpgossip stack /subsystem=jgroups/stack=tcpgossip:add /subsystem=jgroups/stack=tcpgossip/transport=TCP:add(socket-binding=jgroups-tcp) /subsystem=jgroups/stack=tcpgossip/protocol=TCPGOSSIP:add # Set the properties for the TCPGOSSIP protocol /subsystem=jgroups/stack=tcpgossip/protocol=TCPGOSSIP:write-attribute(name=properties,value={initial_hosts="HOST_A[13001]"}) /subsystem=jgroups/stack=tcpgossip/protocol=MERGE3:add /subsystem=jgroups/stack=tcpgossip/protocol=FD_SOCK:add(socket-binding=jgroups-tcp-fd) /subsystem=jgroups/stack=tcpgossip/protocol=FD:add /subsystem=jgroups/stack=tcpgossip/protocol=VERIFY_SUSPECT:add /subsystem=jgroups/stack=tcpgossip/protocol=pbcast.NAKACK2:add /subsystem=jgroups/stack=tcpgossip/protocol=UNICAST3:add /subsystem=jgroups/stack=tcpgossip/protocol=pbcast.STABLE:add /subsystem=jgroups/stack=tcpgossip/protocol=pbcast.GMS:add /subsystem=jgroups/stack=tcpgossip/protocol=MFC:add /subsystem=jgroups/stack=tcpgossip/protocol=FRAG2:add # Set tcpgossip as the stack for the ee channel /subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcpgossip) run-batch reload
Note that the order of protocols defined is important.
Modify the script for your environment.
-
If you are running in a managed domain, you must specify which profile to update by preceding the
/subsystem=jgroups
commands with/profile=PROFILE_NAME
. Adjust the TCPGOSSIP properties, which are optional, for your environment:
-
initial_hosts
: A comma-separated list of the hosts, using the syntaxHOST[PORT]
, that are considered well-known and will be available to look up the initial membership. -
reconnect_interval
: The interval in milliseconds by which a disconnected stub attempts to reconnect to the gossip router. -
sock_conn_timeout
: The maximum time for socket creation. The default is1000
milliseconds. -
sock_read_timeout
: The maximum time in milliseconds to block on a read. A value of0
will block indefinitely.
-
-
If you are running in a managed domain, you must specify which profile to update by preceding the
Run the script by passing the script file to the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect --file=/path/to/SCRIPT_NAME
The TCPGOSSIP stack is now available and TCP is used for network communication. This stack is configured for use with a gossip router so that JGroups cluster members can find other cluster members.
22.2.5. Binding JGroups to a Network Interface
By default, JGroups only binds to the private
network interface, which points to localhost in the default configuration. For security reasons, JGroups will not bind to the network interface defined by the -b
argument specified during JBoss EAP startup, as clustering traffic should not be exposed on a public network interface.
See the Network and Port Configuration chapter in this guide for information about how to configure network interfaces.
For security reasons, JGroups should only be bound to a non-public network interface. For performance reasons, we also recommend that the network interface for JGroups traffic should be part of a dedicated Virtual Local Area Network (VLAN).
22.2.6. Securing a Cluster
There are several concerns to address in order to run a cluster securely:
- Preventing unauthorized nodes from joining the cluster. This is addressed by requiring authentication.
- Preventing non-members from communicating with cluster members. This is addressed by encrypting messages.
Configuring Authentication
JGroups authentication is performed by the AUTH
protocol. The purpose is to ensure that only authenticated nodes can join a cluster.
In the applicable server configuration file, add the AUTH
protocol with the appropriate property settings. The AUTH
protocol should be configured immediately before the pbcast.GMS
protocol.
<subsystem xmlns="urn:jboss:domain:jgroups:4.0"> <stacks> <stack name="udp"> <transport type="UDP" socket-binding="jgroups-udp"/> <protocol type="PING"/> <protocol type="MERGE3"/> <protocol type="FD_SOCK" socket-binding="jgroups-udp-fd"/> <protocol type="FD_ALL"/> <protocol type="VERIFY_SUSPECT"/> <protocol type="pbcast.NAKACK2"/> <protocol type="UNICAST3"/> <protocol type="pbcast.STABLE"/> <protocol type="AUTH"> <property name="auth_class">org.jgroups.auth.MD5Token</property> <property name="auth_value">mytoken</property> <!-- Change this password --> <property name="token_hash">MD5</property> </protocol> <protocol type="pbcast.GMS"/> <protocol type="UFC"/> <protocol type="MFC"/> <protocol type="FRAG2"/> </stack> </stacks> </subsystem>
Configuring Encryption
To encrypt messages, JGroups uses a secret key that is shared by the members of a cluster. The sender encrypts the message using the shared secret key, and the receiver decrypts the message using the same secret key. With symmetric encryption, which is configured using the SYM_ENCRYPT
protocol, nodes use a shared keystore to retrieve the secret key. With asymmetric encryption, which is configured using the ASYM_ENCRYPT
protocol, nodes retrieve the secret key from the coordinator of the cluster after being authenticated using AUTH
.
You must apply Red Hat JBoss Enterprise Application Platform 7.0 Update 01 or a newer cumulative patch to your JBoss EAP installation in order to have access to the SYM_ENCRYPT
and ASYM_ENCRYPT
protocols.
See the JBoss EAP Patching and Upgrading Guide for information on applying cumulative patches.
Using Symmetric Encryption
In order to use SYM_ENCRYPT
, you must set up a keystore that will be referenced in the JGroups configuration for each node.
Create a keystore.
In the following command, replace
VERSION
with the appropriate JGroups JAR version andPASSWORD
with a keystore password.$ java -cp EAP_HOME/modules/system/layers/base/org/jgroups/main/jgroups-VERSION.jar org.jgroups.demos.KeyStoreGenerator --alg AES --size 128 --storeName defaultStore.keystore --storepass PASSWORD --alias mykey
This will generate a
defaultStore.keystore
file that will be referenced in the JGroups configuration.Configure the
SYM_ENCRYPT
protocol in thejgroups
subsystem.In the applicable server configuration file, add the
SYM_ENCRYPT
protocol with the appropriate property settings. TheSYM_ENCRYPT
protocol should be configured immediately before thepbcast.NAKACK2
protocol.<subsystem xmlns="urn:jboss:domain:jgroups:4.0"> <stacks> <stack name="udp"> <transport type="UDP" socket-binding="jgroups-udp"/> <protocol type="PING"/> <protocol type="MERGE3"/> <protocol type="FD_SOCK" socket-binding="jgroups-udp-fd"/> <protocol type="FD_ALL"/> <protocol type="VERIFY_SUSPECT"/> <protocol type="SYM_ENCRYPT"> <property name="provider">SunJCE</property> <property name="sym_algorithm">AES</property> <property name="encrypt_entire_message">true</property> <property name="keystore_name">/path/to/defaultStore.keystore</property> <property name="store_password">PASSWORD</property> <property name="alias">mykey</property> </protocol> <protocol type="pbcast.NAKACK2"/> <protocol type="UNICAST3"/> <protocol type="pbcast.STABLE"/> <protocol type="pbcast.GMS"/> <protocol type="UFC"/> <protocol type="MFC"/> <protocol type="FRAG2"/> </stack> </stacks> </subsystem>
Configuring AUTH
is optional when using SYM_ENCRYPT
.
Using Asymmetric Encryption
Configure the
ASYM_ENCRYPT
protocol in thejgroups
subsystem.In the applicable server configuration file, add the
ASYM_ENCRYPT
protocol with the appropriate property settings. TheASYM_ENCRYPT
protocol should be configured immediately before thepbcast.NAKACK2
protocol.<subsystem xmlns="urn:jboss:domain:jgroups:4.0"> <stacks> <stack name="udp"> <transport type="UDP" socket-binding="jgroups-udp"/> <protocol type="PING"/> <protocol type="MERGE3"/> <protocol type="FD_SOCK" socket-binding="jgroups-udp-fd"/> <protocol type="FD_ALL"/> <protocol type="VERIFY_SUSPECT"/> <protocol type="ASYM_ENCRYPT"> <property name="encrypt_entire_message">true</property> <property name="sym_keylength">128</property> <property name="sym_algorithm">AES/ECB/PKCS5Padding</property> <property name="asym_keylength">512</property> <property name="asym_algorithm">RSA</property> </protocol> <protocol type="pbcast.NAKACK2"/> <protocol type="UNICAST3"/> <protocol type="pbcast.STABLE"/> <!-- Configure AUTH protocol here --> <protocol type="pbcast.GMS"/> <protocol type="UFC"/> <protocol type="MFC"/> <protocol type="FRAG2"/> </stack> </stacks> </subsystem>
Configure the
AUTH
protocol in thejgroups
subsystem.AUTH
is required byASYM_ENCRYPT
. See the Configuring Authentication section for instructions.
22.2.7. Configure JGroups Thread Pools
The jgroups
subsystem contains the default
, internal
, oob
, and timer
thread pools. These pools can be configured for any JGroups stack.
The following table lists the attributes you can configure for each thread pool and the default value for each.
Thread Pool Name | keepalive-time | max-threads | min-threads | queue-length |
---|---|---|---|---|
default | 60000L | 300 | 20 | 100 |
internal | 60000L | 4 | 2 | 100 |
oob | 60000L | 300 | 20 | 0 |
timer | 5000L | 4 | 2 | 500 |
Use the following syntax to configure a JGroups thread pool using the management CLI.
/subsystem=jgroups/stack=STACK_TYPE/transport=TRANSPORT_TYPE/thread-pool=THREAD_POOL_NAME:write-attribute(name=ATTRIBUTE_NAME, value=ATTRIBUTE_VALUE)
The following is an example of the management CLI command to set the max-threads
value to 500
in the default
thread pool for the udp
stack.
/subsystem=jgroups/stack=udp/transport=UDP/thread-pool=default:write-attribute(name="max-threads", value="500")
22.2.8. Configure JGroups Send and Receive Buffers
Resolving Buffer Size Warnings
By default, JGroups is configured with certain send and receive buffer values. However, your operating system may limit the available buffer sizes and JBoss EAP may not be able to use its configured buffer values. In this situation you will see warnings in the JBoss EAP logs similar to the following:
WARNING [org.jgroups.protocols.UDP] (ServerService Thread Pool -- 68) JGRP000015: the send buffer of socket DatagramSocket was set to 640KB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max send buffer in the OS correctly (e.g. net.core.wmem_max on Linux) WARNING [org.jgroups.protocols.UDP] (ServerService Thread Pool -- 68) JGRP000015: the receive buffer of socket DatagramSocket was set to 20MB, but the OS only allocated 212.99KB. This might lead to performance problems. Please set your max receive buffer in the OS correctly (e.g. net.core.rmem_max on Linux)
To resolve this, consult your operating system documentation for instructions on how to increase the buffer size. For Red Hat Enterprise Linux systems, edit /etc/sysctl.conf
as the root user to configure maximum values for buffer sizes that will survive system restarts. For example:
# Allow a 25MB UDP receive buffer for JGroups net.core.rmem_max = 26214400 # Allow a 1MB UDP send buffer for JGroups net.core.wmem_max = 1048576
After modifying /etc/sysctl.conf
, run sysctl -p
for the changes to take effect.
Configuring JGroups Buffer Sizes
You can configure the JGroups buffer sizes that JBoss EAP uses by setting the following transport properties on the UDP and TCP JGroups stacks.
- UDP Stack
-
ucast_recv_buf_size
-
ucast_send_buf_size
-
mcast_recv_buf_size
-
mcast_send_buf_size
-
- TCP Stack
-
recv_buf_size
-
send_buf_size
-
JGroups buffer sizes can be configured using the management console or the management CLI.
Use the following syntax to set a JGroups buffer size property using the management CLI.
/subsystem=jgroups/stack=STACK_NAME/transport=TRANSPORT/property=PROPERTY_NAME:add(value=BUFFER_SIZE)
The following is an example management CLI command to set the recv_buf_size
property to 20000000
on the tcp
stack.
/subsystem=jgroups/stack=tcp/transport=TRANSPORT/property=recv_buf_size:add(value=20000000)
JGroups buffer sizes can also be configured using the management console by navigating to the JGroups subsystem from the Configuration tab, viewing the relevant stack, selecting Transport, and selecting the transport Properties tab.
22.2.9. JGroups Troubleshooting
22.2.9.1. Nodes Do Not Form a Cluster
Make sure your machine is set up correctly for IP multicast. There are two test programs that ship with JBoss EAP that can be used to test IP multicast: McastReceiverTest
and McastSenderTest
.
In a terminal, start McastReceiverTest
.
$ java -cp EAP_HOME/bin/client/jboss-client.jar org.jgroups.tests.McastReceiverTest -mcast_addr 230.11.11.11 -port 5555
Then in another terminal window, start McastSenderTest
.
$ java -cp EAP_HOME/bin/client/jboss-client.jar org.jgroups.tests.McastSenderTest -mcast_addr 230.11.11.11 -port 5555
If you want to bind to a specific network interface card (NIC), use -bind_addr YOUR_BIND_ADDRESS
, where YOUR_BIND_ADDRESS
is the IP address of the NIC to which you want to bind. Use this parameter in both the sender and the receiver.
When you type in the McastSenderTest
terminal window, you should see the output in the McastReceiverTest
window. If you do not, try the following steps.
-
Increase the time-to-live for multicast packets by adding
-ttl VALUE
to the sender command. The default used by this test program is32
and theVALUE
must be no greater than255
. - If the machines have multiple interfaces, verify that you are using the correct interface.
- Contact a system administrator to make sure that multicast will work on the interface you have chosen.
Once you know multicast is working properly on each machine in your cluster, you can repeat the above test to test the network, putting the sender on one machine and the receiver on another.
22.2.9.2. Causes of Missing Heartbeats in Failure Detection
Sometimes a cluster member is suspected by failure detection (FD) because a heartbeat acknowledgement has not been received for some time T
, which is defined by timeout
and max_tries
.
For an example cluster of nodes A, B, C, and D, where A pings B, B pings C, C pings D, and D pings A, C can be suspected for any of the following reasons:
-
B or C are running at 100% CPU for more than
T
seconds. So even if C sends a heartbeat acknowledgement to B, B may not be able to process it because it is at 100% CPU usage. - B or C are garbage collecting, which results in the same situation as above.
- A combination of the two cases above.
- The network loses packets. This usually happens when there is a lot of traffic on the network, and the switch starts dropping packets, usually broadcasts first, then IP multicasts, and TCP packets last.
-
B or C are processing a callback. For example, if C received a remote method call over its channel that takes
T
+ 1 seconds to process, during this time, C will not process any other messages, including heartbeats. Therefore, B will not receive the heartbeat acknowledgement and will suspect C.
22.3. Infinispan
22.3.1. About Infinispan
Infinispan is a Java data grid platform that provides a JSR-107-compatible cache interface for managing cached data. For more information about Infinispan functionality and configuration options see the Infinispan Documentation.
The infinispan
subsystem provides caching support for JBoss EAP. It allows you to configure and view runtime metrics for named cache containers and caches.
When using a configuration that provides high availability capabilities, such as the ha or full-ha profile in a managed domain, or the standalone-ha.xml
or standalone-full-ha.xml
configuration file for a standalone server, the infinispan
subsystem provides caching, state replication, and state distribution support. In non-high-availability configurations, the infinispan
subsystem provides local caching support.
Infinispan is delivered as a private module in JBoss EAP to provide the caching capabilities of JBoss EAP. Infinispan is not supported for direct use by applications.
22.3.2. Cache Containers
A cache container is a repository for the caches used by a subsystem. Each cache container defines a default cache to be used.
JBoss EAP 7 defines the following default Infinispan cache containers:
-
server
for singleton caching -
web
for web session clustering -
ejb
for stateful session bean clustering -
hibernate
for entity caching
Example: Default Infinispan Configuration
<subsystem xmlns="urn:jboss:domain:infinispan:4.0"> <cache-container name="server" aliases="singleton cluster" default-cache="default" module="org.wildfly.clustering.server"> <transport lock-timeout="60000"/> <replicated-cache name="default" mode="SYNC"> <transaction mode="BATCH"/> </replicated-cache> </cache-container> <cache-container name="web" default-cache="dist" module="org.wildfly.clustering.web.infinispan"> <transport lock-timeout="60000"/> <distributed-cache name="dist" mode="ASYNC" l1-lifespan="0" owners="2"> <locking isolation="REPEATABLE_READ"/> <transaction mode="BATCH"/> <file-store/> </distributed-cache> </cache-container> <cache-container name="ejb" aliases="sfsb" default-cache="dist" module="org.wildfly.clustering.ejb.infinispan"> <transport lock-timeout="60000"/> <distributed-cache name="dist" mode="ASYNC" l1-lifespan="0" owners="2"> <locking isolation="REPEATABLE_READ"/> <transaction mode="BATCH"/> <file-store/> </distributed-cache> </cache-container> <cache-container name="hibernate" default-cache="local-query" module="org.hibernate.infinispan"> <transport lock-timeout="60000"/> <local-cache name="local-query"> <eviction strategy="LRU" max-entries="10000"/> <expiration max-idle="100000"/> </local-cache> <invalidation-cache name="entity" mode="SYNC"> <transaction mode="NON_XA"/> <eviction strategy="LRU" max-entries="10000"/> <expiration max-idle="100000"/> </invalidation-cache> <replicated-cache name="timestamps" mode="ASYNC"/> </cache-container> </subsystem>
Note the default cache defined in each cache container. For example, the web
cache container defines the dist
distributed cache as the default. The dist
cache will therefore be used when clustering web sessions.
You can add additional caches and cache containers, for example, for HTTP sessions, stateful session beans, or singleton services or deployments. It is not supported to use these caches directly by user applications.
22.3.2.1. Configure Cache Containers
Cache containers and cache attributes can be configured using the management console or management CLI.
You should avoid changing cache or cache container names, as other components in the configuration may reference them.
Configure Caches Using the Management Console
Once you navigate to the Infinispan subsystem from the Configuration tab in the management console, you can configure caches and cache containers. In a managed domain, make sure to select the appropriate profile to configure.
Add a cache container.
Click the Add button next to the Cache Container heading and enter the settings for the new cache container.
Update cache container settings.
Choose the appropriate cache container and select Container Settings from the drop down. Configure the cache container settings as necessary.
Update cache container transport settings.
Choose the appropriate cache container and select Transport Settings from the drop down. Configure the cache container transport settings as necessary.
Configure caches.
Choose the appropriate cache container and select View. From the appropriate cache tab (for example, Replicated Caches), you can add, update, and remove caches.
Configure Caches Using the Management CLI
You can configure caches and cache containers using the management CLI. In a managed domain, you must specify the profile to update by preceding these commands with /profile=PROFILE_NAME
.
Add a cache container.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:add
Add a replicated cache.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/replicated-cache=CACHE:add(mode=MODE)
Set the default cache for a cache container.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:write-attribute(name=default-cache,value=CACHE)
Configure batching for a replicated cache.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/replicated-cache=CACHE/component=transaction:write-attribute(name=mode,value=BATCH)
Change the Default EJB Cache Container
You can use cache containers in the ejb3
subsystem as described below:
-
To support passivation of EJB session beans, you can use the
ejb
cache container defined in theinfinispan
subsystem to store the sessions. - For remote EJB clients connecting to a clustered deployment on a server, you must provide the cluster topology information to these clients, so that they can fail over to other nodes in the cluster if the node they are interacting with fails.
If you are changing or renaming the default cache container, named ejb
, which supports passivation and the provision of topology information, you must add the cache-container
attribute to the passivation-stores
element and the cluster
attribute to the remote
element, as shown in the example below. If you are just adding a new cache for your own use, you need not make those changes.
<subsystem xmlns="urn:jboss:domain:ejb3:4.0"> <passivation-stores> <passivation-store name="infinispan" cache-container="ejb-cltest" max-size="10000"/> </passivation-stores> <remote cluster="ejb-cltest" connector-ref="http-remoting-connector" thread-pool-name="default"/> </subsystem> <subsystem xmlns="urn:jboss:domain:infinispan:4.0"> ... <cache-container name="ejb-cltest" aliases="sfsb" default-cache="dist" module="org.wildfly.clustering.ejb.infinispan"> </subsystem>
22.3.3. Clustering Modes
Clustering can be configured in two different ways in JBoss EAP using Infinispan. The best method for your application will depend on your requirements. There is a trade-off between availability, consistency, reliability and scalability with each mode. Before choosing a clustering mode, you must identify what are the most important features of your network for you, and balance those requirements.
Cache Modes
- Replicated
- Replicated mode automatically detects and adds new instances on the cluster. Changes made to these instances will be replicated to all nodes on the cluster. Replicated mode typically works best in small clusters because of the amount of information that has to be replicated over the network. Infinispan can be configured to use UDP multicast, which alleviates network traffic congestion to a degree.
- Distributed
Distributed mode allows Infinispan to scale the cluster linearly. Distributed mode uses a consistent hash algorithm to determine where in a cluster a new node should be placed. The number of copies (owners) of information to be kept is configurable. There is a trade-off between the number of copies kept, durability of the data, and performance. The more copies that are kept, the more impact on performance, but the less likely you are to lose data in a server failure. The hash algorithm also works to reduce network traffic by locating entries without multicasting or storing metadata.
You should consider using distributed mode as a caching strategy when the cluster size exceeds 6-8 nodes. With distributed mode, data is distributed to only a subset of nodes within the cluster, as opposed to all nodes.
Synchronous and Asynchronous Replication
Replication can be performed either in synchronous or asynchronous mode, and the mode chosen depends on your requirements and your application.
- Synchronous replication
- With synchronous replication, the thread that handles the user request is blocked until replication has been successful. When the replication is successful, a response is sent back to the client, and only then is the thread is released. Synchronous replication has an impact on network traffic because it requires a response from each node in the cluster. It has the advantage, however, of ensuring that all modifications have been made to all nodes in the cluster.
- Asynchronous replication
- With asynchronous replication, Infinispan uses a thread pool to carry out replication in the background. The sender does not wait for replies from other nodes in the cluster. However, cache reads for the same session will block until the previous replication completes so that stale data is not read. Replication is triggered either on a time basis or by queue size. Failed replication attempts are written to a log, not notified in real time.
22.3.3.1. Configure the Cache Mode
You can change the default cache using the management CLI.
This section shows instructions specific to configuring the web session cache, which defaults to distributed mode. The steps and management CLI commands can easily be adjusted to apply to other cache containers.
Change to Replicated Cache Mode
The default JBoss EAP 7 configuration for the web session cache does not include a repl
replicated cache. This cache must first be added.
The below management CLI commands are for a standalone server. When running in a managed domain, you must specify which profile to update by preceding the /subsystem=infinispan
commands with /profile=PROFILE_NAME
.
Add the
repl
replicated cache./subsystem=infinispan/cache-container=web/replicated-cache=repl:add(mode=ASYNC) /subsystem=infinispan/cache-container=web/replicated-cache=repl/component=transaction:write-attribute(name=mode,value=BATCH) /subsystem=infinispan/cache-container=web/replicated-cache=repl/component=locking:write-attribute(name=isolation, value=REPEATABLE_READ) /subsystem=infinispan/cache-container=web/replicated-cache=repl/store=file:add
Change the default cache to the
repl
replicated cache./subsystem=infinispan/cache-container=web:write-attribute(name=default-cache,value=repl)
Reload the server.
reload
Change to Distributed Cache Mode
The default JBoss EAP 7 configuration for the web session cache already includes a dist
distributed cache.
The below management CLI commands are for a standalone server. When running in a managed domain, you must specify which profile to update by preceding the /subsystem=infinispan
commands with /profile=PROFILE_NAME
.
Change the default cache to the
dist
distributed cache./subsystem=infinispan/cache-container=web:write-attribute(name=default-cache,value=dist)
Set the number of owners for the distributed cache. The following command sets
5
owners. The default is2
./subsystem=infinispan/cache-container=web/distributed-cache=dist/:write-attribute(name=owners,value=5)
Reload the server.
reload
22.3.3.2. Cache Strategy Performance
When using a SYNC
caching strategy, the cost of replication is easy to measure and directly seen in response times since the request does not complete until the replication completes.
Although it seems that the ASYNC
caching strategy should result in lower response times than the SYNC
caching strategy, this is only true under the right conditions. The ASYNC
caching strategy is more difficult to measure, but it can provide better performance than the SYNC
strategy when the duration between requests is long enough for the cache operation to complete. This is because the cost of replication is not immediately seen in response times.
If requests for the same session are made too quickly, the cost of replication for the previous request is shifted to the front of the subsequent request since it must wait for the replication from the previous request to complete. For rapidly fired requests where a subsequent request is sent immediately after a response is received, the ASYNC
caching strategy will perform worse than the SYNC
caching strategy. Consequently, there is a threshold for the period of time between requests for the same session where the SYNC
caching strategy will actually perform better than the ASYNC
caching strategy. In real world usage, requests for the same session are not normally received in rapid succession. Instead, there is typically a period of time in the order of a few seconds or more between the requests. In this case, the ASYNC
caching strategy is a sensible default and provides the fastest response times.
22.3.4. Configure Infinispan Thread Pools
The infinispan
subsystem contains the async-operations
, expiration
, listener
, persistence
, remote-command
, state-transfer
, and transport
thread pools. These pools can be configured for any Infinispan cache container.
The following table lists the attributes you can configure for each thread pool in the infinispan
subsystem and the default value for each.
Thread Pool Name | keepalive-time | max-threads | min-threads | queue-length |
---|---|---|---|---|
async-operations | 60000L | 25 | 25 | 1000 |
expiration | 60000L | 1 | N/A | N/A |
listener | 60000L | 1 | 1 | 100000 |
persistence | 60000L | 4 | 1 | 0 |
remote-command | 60000L | 200 | 1 | 0 |
state-transfer | 60000L | 60 | 1 | 0 |
transport | 60000L | 25 | 25 | 100000 |
Use the following syntax to configure an Infinispan thread pool using the management CLI.
/subsystem=infinispan/cache-container=CACHE_CONTAINER_NAME/thread-pool=THREAD_POOL_NAME:write-attribute(name=ATTRIBUTE_NAME, value=ATTRIBUTE_VALUE)
The following is an example of the management CLI command to set the max-threads
value to 10
in the persistence
thread pool for the server
cache container.
/subsystem=infinispan/cache-container=server/thread-pool=persistence:write-attribute(name="max-threads", value="10")
22.3.5. Infinispan Statistics
Runtime statistics about Infinispan caches and cache containers can be enabled for monitoring purposes. Statistics collection is not enabled by default for performance reasons.
Statistics collection can be enabled for each cache container, cache, or both. The statistics option for each cache overrides the option for the cache container. Enabling or disabling statistics collection for a cache container will cause all caches in that container to inherit the setting, unless they explicitly specify their own.
22.3.5.1. Enable Infinispan Statistics
Enabling Infinispan statistics may have a negative impact on the performance of the infinispan
subsystem. Statistics should be enabled only when required.
You can enable or disable the collection of Infinispan statistics using the management console or the management CLI. From the management console, navigate to the Infinispan subsystem from the Configuration tab, select the appropriate cache or cache container, and edit the Statistics enabled attribute. Use the below commands to enable statistics using the management CLI.
Enable statistics collection for a cache container. A server reload will be required.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:write-attribute(name=statistics-enabled,value=true)
Enable statistics collection for a cache. A server reload will be required.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/CACHE_TYPE=CACHE:write-attribute(name=statistics-enabled,value=true)
You can use the following command to undefine the statistics-enabled
attribute of a cache so that it will inherit the settings of its cache container’s statistics-enabled
attribute.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/CACHE_TYPE=CACHE:undefine-attribute(name=statistics-enabled)
22.3.6. Infinispan Partition Handling
An Infinispan cluster is built out of several nodes where data is stored. To prevent data loss if multiple nodes fail, Infinispan copies the same data over multiple nodes. This level of data redundancy is configured using the owners
attribute. As long as fewer than the configured number of nodes crash simultaneously, Infinispan will have a copy of the data available.
However, there are potential catastrophic situations that could occur when too many nodes disappear from the cluster:
- Split brain
This splits the cluster in two or more partitions, or sub-clusters, that operate independently. In these circumstances, multiple clients reading and writing from different partitions see different versions of the same cache entry, which for many applications is problematic.
NoteThere are ways to alleviate the possibility for the split brain to happen, such as redundant networks or IP bonding. However, these only reduce the window of time for the problem to occur.
- Multiple nodes crash in sequence
- If multiple nodes, specifically the number of owners, crash in rapid sequence and Infinispan does not have the time to properly rebalance its state between crashes, the result is partial data loss.
The goal is to avoid situations in which incorrect data is returned to the user as a result of either split brain or multiple nodes crashing in rapid sequence.
22.3.6.1. Split Brain
In a split brain situation, each network partition will install its own JGroups view, removing the nodes from the other partitions. We do not have a direct way to determine whether the cluster has been split into two or more partitions, since the partitions are unaware of each other. Instead, we assume the cluster has split when one or more nodes disappear from the JGroups cluster without sending an explicit leave message.
With partition handling disabled, each such partition would continue to function as an independent cluster. Each partition may only see a part of the data, and each partition could write conflicting updates in the cache.
With partition handling enabled, if we detect a split, each partition does not start a rebalance immediately, but first checks whether it should enter degraded mode instead:
- If at least one segment has lost all its owners, meaning that at least the number of owners specified has left since the last rebalance ended, the partition enters degraded mode.
- If the partition does not contain a simple majority of the nodes (floor(numNodes/2) + 1) in the latest stable topology, the partition also enters degraded mode.
- Otherwise, the partition keeps functioning normally and starts a rebalance.
The stable topology is updated every time a rebalance operation ends and the coordinator determines that another rebalance is not necessary. These rules ensure that at most, one partition stays in available mode, and the other partitions enter degraded mode.
When a partition is in degraded mode, it only allows access to the keys that are wholly owned:
- Requests (reads and writes) for entries that have all the copies on nodes within this partition are honored.
-
Requests for entries that are partially or totally owned by nodes that have disappeared are rejected with an
AvailabilityException
.
This guarantees that partitions cannot write different values for the same key (cache is consistent), and also that one partition can not read keys that have been updated in the other partitions (no stale data).
Two partitions could start up isolated, and as long as they do not merge, they can read and write inconsistent data. In the future, we may allow custom availability strategies (e.g. check that a certain node is part of the cluster, or check that an external machine is accessible) that could handle that situation as well.
22.3.6.2. Configuring Partition Handling
Currently the partition handling is disabled by default. Use the following management CLI command to enable partition handling:
/subsystem=infinispan/cache-container=web/distributed-cache=dist/component=partition-handling:write-attribute(name=enabled, value=true)
22.3.7. Externalize HTTP Sessions to JBoss Data Grid
You will need a Red Hat JBoss Data Grid subscription to use this functionality.
Red Hat JBoss Data Grid can be used as an external cache container for application-specific data in JBoss EAP, such as HTTP sessions. This allows scaling of the data layer independent of the application, and enables different JBoss EAP clusters, which may reside in various domains, to access data from the same JBoss Data Grid cluster. Additionally, other applications can interface with the caches presented by Red Hat JBoss Data Grid.
The following example shows how to externalize HTTP sessions. It applies to both standalone instances of JBoss EAP as well as managed domains. However, in a managed domain, each server group requires a unique remote cache configured. While multiple server groups can utilize the same Red Hat JBoss Data Grid cluster, the respective remote caches will be unique to the JBoss EAP server group.
For each distributable application, an entirely new cache must be created. It can be created in an existing cache container, for example, web.
To externalize HTTP sessions:
Define the location of the remote Red Hat JBoss Data Grid server by adding the networking information to the
socket-binding-group
.Example Adding Remote Socket Bindings
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=remote-jdg-server1:add(host=JDGHostName1, port=11222) /socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=remote-jdg-server2:add(host=JDGHostName2, port=11222)
Resulting XML
<socket-binding-group name="standard-sockets" ... > ... <outbound-socket-binding name="remote-jdg-server1"> <remote-destination host="JDGHostName1" port="11222"/> </outbound-socket-binding> <outbound-socket-binding name="remote-jdg-server2"> <remote-destination host="JDGHostName2" port="11222"/> </outbound-socket-binding> </socket-binding-group>