A couple findings: 1) TransporterInvocation.readExternal(...) doesn't update the member variables but only the local final ones. 2) TransporterInvocation.writeExternal(...) checks if the length values of parameterTypes and args are same, but I think this code should be moved to readExternal(...). Except the above, it looks very good to me. :) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4187197#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...