I get what you are saying. You are expecting a exception to be thrown when the transaction times out. Thats not going to happen. JBoss will just mark the transaction for rollback and log a WARN message (which you are already seeing) when a transaction times out. However after the transaction times out if any operation is done on the transaction context (maybe commit or some other activity) then an exception is thrown mentioning that the transaction is already marked for rollback. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4012551#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...