Upgrading to EAP 6.0.1 causes "ClassNotFoundException" / "NoClassDefFoundError" and "Failed to load application components!" while accessing Admin Console

Solution Verified - Updated -

Environment

  • JBoss Enterprise Application Platform (EAP)
    • 6.0.1
  • Using RPM version of EAP 6 and yum update from EAP 6.0.0 to EAP 6.0.1

Issue

While upgrading EAP 6.0.0 installation to EAP 6.0.1 using yum update command and after restarting EAP 6 service when we try to access the Admin Console then receives the following message: Failed to load application components! and the console does not function after that.

And I'm getting the following ClassNotFoundException or NoClassDefFoundError on org.jboss.el.cache.FactoryFinderCache in server.log:

Caused by: java.lang.ClassNotFoundException: org.jboss.el.cache.FactoryFinderCache from [Module "org.jboss.as.web:main" from local module loader @851052d (roots: /usr/share/jbossas/modules)]
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:123) [jboss-as-server.jar:7.1.3.Final-redhat-4]: 
...

or

Caused by: java.lang.NoClassDefFoundError: org/jboss/el/cache/FactoryFinderCache
        at org.jboss.as.web.deployment.ELExpressionFactoryProcessor.deploy(ELExpressionFactoryProcessor.java:106)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:116) [jboss-as-server.jar:7.1.3.Final-redhat-4]
        ... 5 more

Resolution

  • Please follow the below steps to workaround this issue.

    1. Make sure that JBoss EAP is not running, stop JBoss EAP if it is running as below:

      $ service jbossas stop

      or

      $ service jbossas-domain stop

    2. Run the below command which will remove all old index files therefore forcing a new indexing at the next JBoss EAP start:

      $ find /usr/share/jbossas/modules/ -type f -name *.jar.index -exec rm -vf {} \;

      or

      $ find /usr/share/jbossas/modules -name '*.jar.index' -delete

  • If you are wondering what are those files *.jar.index meant for, then please go through the article What is the use of '.index' files in EAP 6 modules directory? which talks about it.

Root Cause

This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form.

Comments