Well.. we haven't tested with Spring so we've no idea whether it works or not with Spring. At the end of the day we don't know what calls Spring is making or whether it is obeying the XA usage contract. At first glance it looks like something (Spring?) is not closing sessions. If you can replicate without using Spring that would be great. Thx. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4019445#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...