Hi Peter Thank you for your reponse I am running on linux so each thread has a PID The main thread is 21997 but htop shows that pid 21997 AND 21998 are eating the CPU but jstack 21997 does not provide anything on 21008 It is like if htop is telling me processId 21997 created thread 21998 and thread 21998 is eating the CPU But jstack is telling me process 21997 doesn't have anything on thread 21998 matt View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200446#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...