"maliksaheb" wrote : Hi | | According to the last message posted here, does it mean that to define failover capabilities, ha-XXXX-datasource is not needed in JBoss 5? Yes, check the corresponding test case related -ds.xml configuration files here https://anonsvn.jboss.org/repos/jbossas/trunk/testsuite/src/resources/jca... Here is the corresponding -ds.xml files from older Jboss configuration http://anonsvn.jboss.org/repos/jbossas/branches/JBPAPP_4_2/testsuite/src/... You will notice that there is change from ha-local-tx-datasource to local-tx-datasource in the configuration. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4229248#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...