ClassCastException of entity after SFSB activate

[carstenrudat]

I'm using JBoss 4.0.4 GA an I wrote a stateful session bean which has to entitymanager injected (like the following)

@PersistenceContext(unitName="myunit",type=PersistenceContextType.EXTENDED) protected EntityManager em;

When the bean is activeted after passivation, I get an ClassCastEx. The following code throws the exception:

MyEntity m = null;
Object test = this.em.find(MyEntity.class, aCorrectPkWichIsALong);
//test is found - debugger says: Yep, it is a ....MyEntity
m = (MyEntity)o; //ClassCastException

I tried to make the em transient and set him to null - both did not work.

I also set up a jboss-app.xml in my EAR to separate classloaders:

<jboss-app>
 <loader-repository>
 dot.com:loader=testproject-Hanse1.ear
 </loader-repository>
</jboss-app>

but that has no effect, too.

What could I do?

Best regards,
Carsten

[dreuzel]

I think I've the same problem,
As soon as using my own classes to be passed to the bean the classloader seems to fail or at least gets desynchronized.

Up to now i changed some Jboss parameters
changing the classes unsuccessfull though

[ben.wang]

Can you produce a junit test case or post the stack trace?