yes, I have an idea. This is not jBPM related at all, but caused by your connectionpool/drivers. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158436#4158436 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4158436