I'm not sure from your description exactly what it is you are doing, but I suspect your client threads are running in the JBoss server VM. In that case, JBoss will detect that the client is in the same VM and will route invocations to the local bean as a performance optimization. When we load/stress test EJB clustering we run the clients in a separate VM. You don't need a separate process per client; you can spawn multiple threads in the client VM. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4196122#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...