Hello, I did a simple test and I couldn't see there is a problem. I used the topic example in JBM 1.x with some changes. I sent 40k messages and had a message listener. In its onMessage() I gave a 5 sec sleep. Tests shows in about 10 sec all messages have been sent while at the receiving end only two messages was arrived. Do you have a test to reproduce this? Howard View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4266960#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...