try searching the 'JBoss Transactions' forum - there you will find quit informative discussions on this topic View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4080771#4080771 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4080771