Aha I have found the exact same problem in this thread. http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4035795#... In my stack trace sync=org.jbpm.db.JobSession$DeleteJobsSynchronization@27a68c Session is closed! The only question is how I get around it. So if i'm understanding correctly JobSession clears up tasks the have just ended? The session is closed, transaction commited which causes DeleteJobSynchronization. This fails because of closed session. The question is what can I do about it? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4121872#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...