Troubleshooting

[tobias]

I'll use this thread to collect hints for a troubleshooting huide/section/whatever.

Feel free to amend it with useful tips. Unanswered question will be deleted from this thread.

[tobias]

Problem:

Warning: The entity bean class must not be defined as abstract.

Solution:

Better warning by JBoss or use correct doctype like:
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">

[tobias]

Problem:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException:

or

javax.naming.CommunicationException. Root exception is java.rmi.UnmarshalException:

Solution:
Update your JBoss client jar files on the client side. (Did you upgrade, using two versions ?)