Java.io.InvalidClassException: org.jboss.proxy.Interceptor...

Question

Hi there,
I'm working on a JSP running on a Tomcat server 4.0.1. Such JSP calls a Servlet, which tries to recover an EJB:
     public CommunityEJB getCommunityEJB() throws UnexpectedException
          CommunityEJB lRet = null;
          CommunityEJBHome lhome = null;
          Context jndiContext = null;
          try
               lhome = (CommunityEJBHome) ServiceLocator.getInstance().getEJBHome(JNDINames.EJB_COMMUNITY);
               lRet = lhome.create();
          catch (Exception e)
               UnexpectedException ue = new UnexpectedException(e);
               logger.throwing(CLASS_NAME, "getCommunityEJB", ue);
               throw ue;
          return lRet;
The EJB is recovered though JNDI, running on JBoss 3.2.1. Tomcat server and JBoss are running separately (Tomcat I'm using is not the embedded in JBoss).
The code above throws the next exception:
tuamo.core.exception.UnexpectedException: javax.naming.CommunicationException [Root exception is java.io.InvalidClassException: org.jboss.proxy.Interceptor; local class incompatible: stream classdesc serialVersionUID = 4358098404672505200, local class serialVersionUID = 8774269974037850782]
Can anybody help me with this?
Thanks!!

Answer 1

The EJB client jar is out of sync with the EJB server jars. In simple words, you might have recompiled any or all of the following and either only redeployed it on the server or dropped it in the client classpath depending on where did you make the changes.
home interface
remote interface
types being passed over the methods in these interfaces (parameters, return values, etc.)
I'm not quite sure what you mean by recovering an EJB? Typically its called looking it up.