It has been almost 6 weeks since we reverted our JBoss to version 4.0.3sp1 and on that server the problem hasn't returned. That seems conclusive that the problem doesn't exist in 4.0.3sp1. We upgraded a different JBoss server from 4.2.1 to 4.2.2 about 2 weeks ago and it still has the same problems. We also upgraded Java to 1.6.0_04 on both servers. One other thing to add: We thought maybe load might be a cause, but the new JBoss server has very light load and still has the problem. Anybody have any suggestions? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4136023#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...