It's the result of stop being called twice. http://jira.jboss.com/jira/browse/EJBTHREE-711 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3988258#3988258 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3988258