I deployed an XA data source using the wiki instructions here: http://www.jboss.org/community/docs/DOC-12246 In part, it tells me to add this to the ds.xml file: <mbean code="org.jboss.resource.adapter.jdbc.vendor.OracleXAExceptionFormatter" | name="jboss.jca:service=OracleXAExceptionFormatter"> | <depends optional-attribute-name="TransactionManagerService">jboss:service=TransactionManager</depends> | </mbean> However, when I start the server, I get this warning: anonymous wrote : WARN [com.arjuna.ats.jbossatx.jta.TransactionManagerService] XAExceptionFormatters are not supported by the JBossTS Transaction Service - this warning can safely be ignored The docs told me to add it to the -ds.xml, but the server is telling me it isn't supported. I don't understand. :) Should that mbean definition be removed from the ds.xml? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4193132#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...