Problems with separated ClassLoaders for EARs and pooled invoker (PooledInvokerHA). ----------------------------------------------------------------------------------- Key: JBAS-3198 URL: http://jira.jboss.com/jira/browse/JBAS-3198 Project: JBoss Application Server Issue Type: Bug Security Level: Public(Everyone can see) Components: ClassLoading Affects Versions: JBossAS-4.0.5.CR1 Environment: Windows XP, HP-UX 11, JDK 1.4.2 and 1.5 Reporter: Eric Hambuch Assigned To: Tom Elrod Priority: Critical Fix For: JBossAS-5.0.0.CR1, JBossAS-4.2.0.CR1, JBossAS-4.0.5.SP1 When using the pooled invoker (PooledInvokerHA) in the "all" configuration with separated classloaders for each EAR (as described in Wiki:ClassLoadingConfiguration) an invocation to a bean causes confusion to the separated classloaders. More detailed: I switched from jrmpha-invoker (which creates a new thread for each request which is really bad) to pooledha invoker in a clustered environment. I have to Stateless Session Beans that share the same bean interface. Each Session Bean is deployed in a separate EAR. In "ear-deployer.xml" I switched "isolated" to "true" to separate the classloaders of the EARs. When I call the first bean everything works fine. But when I try to call the second bean (same interface, but different bean!) JBoss throws the following exception: java.rmi.ServerException: RuntimeException; nested exception is: java.lang.IllegalArgumentException: argument type mismatch at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:386) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:196) at org.jboss.ejb.plugins.CleanShutdownInterceptor.invoke(CleanShutdownInterceptor.java:264) at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122) at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624) at org.jboss.ejb.Container.invoke(Container.java:873) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80) at org.jboss.mx.server.Invocation.invoke(Invocation.java:72) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644) at org.jboss.invocation.pooled.server.PooledInvokerHA.invoke(PooledInvokerHA.java:146) at org.jboss.invocation.pooled.server.ServerThread.processInvocation(ServerThread.java:213) at org.jboss.invocation.pooled.server.ServerThread.dorun(ServerThread.java:268) at org.jboss.invocation.pooled.server.ServerThread.run(ServerThread.java:139) Caused by: java.lang.IllegalArgumentException: argument type mismatch at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.invocation.Invocation.performCall(Invocation.java:345) at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:214) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:149) at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:106) at org.jboss.ejb.plugins.AbstractTxInterceptorBMT.invokeNext(AbstractTxInterceptorBMT.java:158) at org.jboss.ejb.plugins.TxInterceptorBMT.invoke(TxInterceptorBMT.java:62) at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:154) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:153) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192) The IllegalArgumentException comes from the fact that the Method.invoke() is called with a class of the wrong classloader (class from other EAR). With jrmpha-invoker everything works fine. Maybe the thread pool causes a mixture of the classloaders? I created a minimized example that can be provided if required.