let me explain my situation: i'd like to have ejb behave polymorphic like with plain java classes. I know ONE interface of my ejbs but not ALL - and i don't need to know them all. All my ejbs implement one common remote interface. I create ejb instances with a lookup and assign the ejb proxy to a variable typed with that know interface. Now enters the org.jboss.ejb3.stateful.StatefulRemoteProxy that gets unmarshalled in my ear. That object references all the other remote interfaces of that ejb thus forcing a class loading of these interfaces - which is why i have to supply all these interfaces although i don't use them in code. As you can see, I dont really want these interfaces to be downloaded anyway. Its only for the sake of the StatefulRemoteProxy instance. There would be no need to download any classes remotely, because i have the known interface and the known parameter types included in each ear . What breaks my architecture is the needs of the StatefulRemoteProxy. Without this i cannot build a factory that is able to instantiate ejbs deployed in other isolated ears. Perhaps there is some completely other way I cannot think of ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160453#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...