Problems with separated ClassLoaders for EARs and pooled invoker (PooledInvokerHA).

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.