Current PostGres supports a subset of the XA specification. As you discovered, suspend/resume is not supported which requires that a connection cannot be dissassociated from a transaction until completion. I will file a JIRA task to create a postgres-xa-ds.xml file with the necessary qualifications for use. I can get this into JBoss 4.2. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3986007#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...