Hi :-) Thank you very much for the reply. 1. The callbacks delivering order is very important in my app, so I really need determinism. I'm using push callbacks and the socket transport, so I will configure the connection pool as you say. 2. I didn't know that you can put a personalized session ID in the Client. That's just what I need. Your help was great, thanx! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024754#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...