[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Session recovery on rollback

Nearly correct, except that you still can't guarantee the ordering if the messages are truly nacked, e.g. consumer or session.close(); e.g. competing consumers on the same queue messages (m1, m2) consumer1: receive m1 consumer2: receive m2 Race { consumer1.close(); consumer2.rollback(); } what does consumer2.receive() get? If you can avoid nacking the message back to the server then yes, you avoid *some* race conditions where the messages get "out of order". Since those race conditions exist, and hence the ordering ambiguities exist, it isn't necessarily worthwhile trying to achieve the impossible. Don't spend 90% of your time on 10% of the problem. :-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958159#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...