"paul_da_programmer" wrote : I'm only interested in the ATOMIC ('A' in ACID) aspect of a transaction. What I want to guarantee in using a JMS in a NONPERSISTENT mode is that if the JMS transaction ends abruptly, that all DB work will be back out ATOMICALLY (i.e. all or none) | If you are using only non persistent messages, then there is nothing to "back out" from the DB, since nothing has been saved to the db. Perhaps I don't follow what you are trying to say... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4047996#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...