Clebert, I have now tried the same code (with the modifications you suggested) on 3 machines - Windows XP, Windows Vista and Windows NT. The only machine without the connection failures is Windows NT. XP and Vista seem to start giving issues after receiving 500 messages. What OS did you run your test on? - Any other next steps you suggest? - Can I monitor the connections somehow? - What does the error message mean ("Connection failure has been detected Did not receive ping from server:3")? Thanks. Naresh View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4242602#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...