Hi dungying, I'm running through the same problem! I don't understand what happens with the serialization after the application stays inactive for a short time, and I cannot deal with the errors "Could not create bean ..." or "could not destroy bean...". Did you have any luck with it. I'm sure I'm missing something really important here. Please help. Any indication appreciated. Thanks, Elenh. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003209#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...