Why are you using Toplink Essentials instead of Hibernate? There are no advantages to that, only drawbacks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4062670#4062670 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4062670