I read the JMS spec but I didn't really see the description of a session/message affinity at rollback. Regardless, sessions are not thread-safe so using a thread-pool is an issue because it requires I have multiple sessions, only one of which can see its recently rolled back messages. We just received the support contract for JBoss EAP 4.3, so I'll be working with 1.4.0 over the coming weeks. Thanks for the quick reply. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4140554#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...