Thanks .. some more questions: 1. Is resouce manager active only for the scope of the transaction ? 2. So TM tells RM to not autocommit ? Is it possible to explain how and when that happens ? 3. Do RM need to register with TM ? How does it register and how does TM communicates with RM 4. In case if there is a failure between "yes ready to commit" and "please commit now" then would all the transaction(s) involved result in rollback ? 5. We are using Tibco Server along with Jboss. How would the JTA work in this case ? Would Tibco Server need to register itself as a resource manager with JTA ? Where can I see the settings ? I read about XAResource, didn't find good article and ones I did find confused me more. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4151848#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...