My understanding is - the commit phase errors needs to be retried by the TM (probably in a background thread) else some resource may have already committed while one is repoting exception leaving in an inconsistent state. However, after few retries, probably TM should report the error back to the client/admin to resolve the issue manually/other means. Eceptions during Prepare transactions should also work exactly same as commit except the overall outcome is rollback (as opposed to commit in commit phase) - that is, they also to be retried. Well, that is theory, at least :). I am not sure JBossTS does any retries. Thanks Madhu View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972254#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...