Getting a few thread dump might help pinpoint where in the application the problem is. I recall helping one customer whose system was showing 80% CPU usage when no sessions were active. Turns out that the application code had an infinite loop, and three of the requests were in that loop. Doing several dumps in a row an noticing that those three threads were still in the same code after a couple of minutes helped to pinpoint the problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094802#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...