vickyk, Thanks a lot! I follow your suggestion to put session.close() into finally block. It worked. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3994766#3994766 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3994766