I found similar problem in Hibernate forum, but still no clean solution: http://forum.hibernate.org/viewtopic.php?p=2371113 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4112173#4112173 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4112173