I forgot one question. You seem to be saying that there is a unique JGroups thread for the node? Is that right and why? I don't see why it should be like the Swing EventDispatchThread thread? Thanks for your help because JMS is the one thing that has caused me the most headaches (so far, touching wood) in my clustering our application. Maybe it is easier in JBoss 5? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4205368#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...