Workaround for RMI interoperability between JBoss EAP 5.x and EAP 4.x

Issue

• We are looking for a solution for JBoss EAP 5.2 to add external jar (from a directory) in the same classloader of a webapp
• ejb rmi call between eap4 and eap5

• We're testing integration between JBoss EAP 4.3 (Sun JDK 1.5) and JBoss EAP 5.1 (Sun JDK 1.6). How can we make them communicate via RMI? When we try a common EJB 2.1 invocation from 4.3 to 5.1, we have the following exception:

  java.lang.ArrayIndexOutOfBoundsException: 21
          at org.jboss.invocation.InvocationKey.readResolve(InvocationKey.java:170)
          at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
  ...
  

The exception is thrown by the JNDI lookup:

   InitialContext ic = new InitialContext(props);
   Object objref = ic.lookup(Constants.SERVICE_JNDI_NAME);   // --> ArrayIndexOutOfBoundsException