Thanks very much, I'll try to ask EJB to do load data instead of invoking EnityManager directly. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4262653#4262653 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4262653