4.2.3. Find the JBoss Module Dependency

To resolve the dependency, first, try to find the module that contains the class specified by the ClassNotFoundException by looking in the EAP_HOME/modules/system/layers/base/ directory. If you find a module for the class, you must add a dependency to the manifest entry.
For example, if you see this ClassNotFoundException trace in the log:
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.Log 
    from [Module "deployment.TopicIndex.war:main" from Service Module Loader]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:188)
Find the JBoss module containing this class by doing the following:

Procedure 4.5. Find the Dependency

  1. First determine if there is an obvious module for the class.
    1. Navigate to the EAP_HOME/modules/system/layers/base/ directory and look for the module path matching class named in the ClassNotFoundException.
      You find the module path org/apache/commons/logging/.
    2. Open the EAP_HOME/modules/system/layers/base/org/apache/commons/logging/main/module.xml file and find the module name. In this case, it is "org.apache.commons.logging".
    3. Add the module name to the Dependencies in the MANIFEST.MF file:
      Manifest-Version: 1.0
      Dependencies: org.apache.commons.logging
  2. If there is no obvious module path for the class, you may need to find the dependency in another location.
    1. Find the class named by the ClassNotFoundException in the Tattletale report.
    2. Find the module containing the JAR in the EAP_HOME/modules directory and find the module name as in the previous step.