Simply upgrading Hibernate Core to v3.2.5GA seemed to work out fine. The compatibility matrix was helpful. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071728#4071728 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4071728