I too have the same issue, my MDB processes 2000-4000 messages from the Q and stops after that. I checked up the console for the number of MDB's and it always shows 0, i tried trace and saw the MDB count is always says using 0/10 free instances in the pool. once MDB stops processing messages, the Q ultimates piles up with messages. I had to restart the server for it to process messages again we are using Jboss-4.0.4.GA, JDK 1.5.0_09 on sun solaris. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041037#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...