The problem is that "classic" http requests go through a PortalServlet, then through TransactionInterceptor where is created the hibernate session/transaction. Ajax request don't go the same way, these requests are directly redirected to the JSF FacesServlet. So no TransactionInterception is involved and no hibernate session created ... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4204160#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...