"timfox" wrote : "paul_da_programmer" wrote : If the JMS implementation is an XA compliant one, even without persistence then the answer is yes. | | Yes. But this has got absolutely nothing to do with whether JBM persists non persistent messages or not. I guess that really was my original question, after I refined it with your help :) Q: Is JMS a XA compilant resource even without PERSISTENCE? A: Yes! My misunderstanding came from the assumption that JMS was XA compliant only because of XA compliant persistence. Thanks for your help! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048048#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...