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From Sean Laval <seanla...@uk.ibm.com>
Subject ejb classloader problem
Date Thu, 04 Nov 2004 14:46:58 GMT




I have an EJB module that uses JCS deployed to a WebSphere Portal 5
application server. The JCS library is shipped as an EAR library. If the
application delegation mode is set to Parent_First I get the following
error when the ejb tries to start.

java.lang.NoClassDefFoundError: org/apache/jcs/access/CacheAccess
      at java.lang.Class.newInstance0(Native Method)
      at java.lang.Class.newInstance(Class.java(Compiled Code))
      at com.ibm.ejs.container.EJSContainer.loadBeanMetaData(EJSContainer.java:1321)
      at com.ibm.ejs.container.EJSContainer.getHomeWrapperCommon(EJSContainer.java:984)
      at com.ibm.ejs.container.EJSContainer.getHomeInstance(EJSContainer.java:907)
      at com.ibm.ejs.container.EJSContainer.startBean(EJSContainer.java:886)
      at com.ibm.ws.runtime.component.EJBContainerImpl.startBean(EJBContainerImpl.java:1255)
      at com.ibm.ws.runtime.component.EJBContainerImpl.install(EJBContainerImpl.java:988)
      at com.ibm.ws.runtime.component.EJBContainerImpl.start(EJBContainerImpl.java:1462)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:415)
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:808)
      at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:351)
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:578)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:268)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:246)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:543)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:418)
      at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:126)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:543)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:418)
      at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:183)
      at com.ibm.ws.runtime.WsServer.start(WsServer.java:128)
      at com.ibm.ws.runtime.WsServer.main(WsServer.java:225)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.ibm.ws.bootstrap.WSLauncher.main(WSLauncher.java:94)
      at com.ibm.etools.websphere.tools.runner.api.ServerRunnerV5$1.run(ServerRunnerV5.java:97)

If I set the delegation mode to parent last the app will start but I am
reluctant to do that for various reasons, 1 of which is getting class cast
exceptions when looking up and casting ejb homes.

Can anyone help me please?

Regards,

Sean


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