There was jms-tests validating the delivery-counter. We are updating the message as soon as we deliver, and those tests were receiving messages several more times without ACKing them. We used to update delivery counters only on ACK. Now that we update them before delivery, I had to change thos JMStests. anonymous wrote : Also you need core integration tests that test delivery count and starting and stopping the server I will probably come up with more tests, but so far I have this: http://anonsvn.jboss.org/repos/messaging/trunk/tests/src/org/jboss/messag... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211059#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...