5 Replies Latest reply on Jul 8, 2011 5:58 PM by Prasad Deshpande Branched from an earlier discussion.

    ClassNotFoundException for entities being referenced from session beans

    Martin Vecera Novice



      I have an ear with two ejb modules (one contains entities and second session beans). Session beans depends on entities but AS7 tries to deploy the ejb module with session beans first which fails with ClassNotFoundException. I tried that with CR1 which should have been fixed. What is the situation with that?

        • 1. Re: Classloading of EJB-Modules in AS7
          Stuart Douglas Master

          Can you post the full stack trace, and details of exactly how the classes are packaged?

          • 2. Re: Classloading of EJB-Modules in AS7
            Martin Vecera Novice



            attached is an ear and sources to reproduce the issue. Simply start standalone and place ear.ear in deployments directory. I even tried jboss-deployment-structure.xml to explicitely turn off isolated deployments but it did not help. Setting module dependencies in the same file does not help either. It seems like a JIRA candidate...


            Here is the stack trace:

            10:20:04,343 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC00001: Failed to start service jboss.deployment.unit."ear.ear".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."ear.ear".INSTALL: Failed to process phase INSTALL of deployment "ear.ear"
                 at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121)
                 at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
                 at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
                 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_25]
                 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_25]
                 at java.lang.Thread.run(Thread.java:662) [:1.6.0_25]
            Caused by: java.lang.RuntimeException: Error getting reflective information for class class org.jboss.test.engine.TaskHelper
                 at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:70)
                 at org.jboss.as.ee.component.EEModuleClassDescription$DefaultConfigurator.configure(EEModuleClassDescription.java:142)
                 at org.jboss.as.ee.component.EEClassConfigurationProcessor.processClasses(EEClassConfigurationProcessor.java:124)
                 at org.jboss.as.ee.component.EEClassConfigurationProcessor.deploy(EEClassConfigurationProcessor.java:73)
                 at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115)
                 ... 5 more
            Caused by: java.lang.NoClassDefFoundError: org/jboss/test/domain/Company
                 at java.lang.Class.getDeclaredMethods0(Native Method) [:1.6.0_25]
                 at java.lang.Class.privateGetDeclaredMethods(Class.java:2427) [:1.6.0_25]
                 at java.lang.Class.getDeclaredMethods(Class.java:1791) [:1.6.0_25]
                 at org.jboss.as.server.deployment.reflect.ClassReflectionIndex.(ClassReflectionIndex.java:65)
                 at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:66)
                 ... 9 more
            Caused by: java.lang.ClassNotFoundException: org.jboss.test.domain.Company from [Module "deployment.ear.ear.engine.jar:main" from Service Module Loader]
                 at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)
                 at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
                 at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
                 at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
                 at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
                 ... 14 more
            • 3. Re: Classloading of EJB-Modules in AS7
              Prasad Deshpande Expert

              You can move your domain.jar in lib of your ear, remove reference of domain.jar from application.xml & deploy it. It will work.


              packaging like :


                   + ---- lib

                   |       |------- commons-lang-2.4.jar

                   |       |------- domain.jar


                  +----- META-INF

                  |       +-- application.xml (jboss-deployment-structure.xml & other files)


                  + ---- engine.jar

              will work.

              • 4. Re: Classloading of EJB-Modules in AS7
                Martin Vecera Novice

                Thanks for your tip, this really helped. However, isn't it sort of workaround? Shouldn't it work in the original form as well?

                • 5. Re: Classloading of EJB-Modules in AS7
                  Prasad Deshpande Expert

                  Packaging I mentioned above is a standard according to Java EE5 specification, it's not a workaround, and according to it, helper classes should go in lib directory of application. From EJB3 onwards, your entities are pojo classes, not entity beans as such it was in EJB2.x & should go in lib directory. You should not add them as ejb module in application.xml. While deploying in AS7, you can have jar deployed alongside your engine.jar but then you'll need to add Dependencies in the manifest of engine.jar as a dependent module. Better way is to just put them in lib directory as classes in lib directory will be automatically available to engine.jar.