java.lang.Class cannot be cast to java.lang.String when invoking a EJB Bean Method

[gizzie]

I've faced with the problem. I've successfully lookuped my remote bean from JBoss, but when I try to invoke any of its method next exception is about to appear:

    java.lang.Class cannot be cast to java.lang.String.

Full stack trace is:

  java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.String

  at org.jboss.ejb.client.remoting.ProtocolMessageHandler.readAttachments(ProtocolMessageHandler.java:56)

  at org.jboss.ejb.client.remoting.InvocationExceptionResponseHandler$MethodInvocationExceptionResultProducer.getResult(InvocationExceptionResponseHandler.java:85)

  at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:212)

  at org.jboss.ejb.client.TransactionInterceptor.handleInvocationResult(TransactionInterceptor.java:47)

  at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:214)

  at org.jboss.ejb.client.ReceiverInterceptor.handleInvocationResult(ReceiverInterceptor.java:96)

  at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:203)

  at org.jboss.ejb.client.EJBClientInvocationContext.awaitResponse(EJBClientInvocationContext.java:341)

  at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:126)

  at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:107)

  at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:90)

  at com.sun.proxy.$Proxy32.createEvent(Unknown Source)

  at com.mypackage.FacadeImpl.createEvent(FacadeImpl.java:89)

  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

  at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)

  at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:201)

  at com.sun.proxy.$Proxy28.createEvent(Unknown Source)

Last row is the invocation of my method called "CreateEvent".

I guess the exception is throwned inside "getResult()" method of EJBClientInvocationContext.

My code is:

IEventDao eventDao = (IEventDao) ctx.lookup("java:/task/EventDao!MyPackage.IEventDao");

EventDao has been successfully gotten from the remote.

Trying to invoke a method:

public Event createEvent(final Event event) {

       return eventDao.createEvent(event);

}

Event event = new EventImpl("Test event: Star Wars: Episode VI");

createEvent(event); <-- Line #89. Exception has been throwned.

CreateEvent method body. But just for your info: it's not even enter this piece of code. It throwns the exception before even invoking `entityManager.persist(event);`

    @Transactional(propagation = Propagation.REQUIRED)

    public Event createEvent(Event event) {

        entityManager.persist(event);

        return event;

    }

Any ideas? Thank you.