Any updates on this? I seem to be having the same problem. I'm intercepting a method of an entity bean and calling a session bean in the interceptor where I lookup the session bean using JNDI. It works under light load but under heavy load it yields the same error messages - "Cannot open connection" and "Transaction is not active". Thanks, Mohammed Firdaus View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970682#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...