Hey Vickyk, Thanks for the response. I am using the same xml files and I did see the test-ha-ds.xml files. Initially I was using <connection-url> like this | <connection-url>jdbc:oracle:thin@xxxxx:1521@sid|jdbc:oracle:thin@xxxxx:1521@sid</connection-url> | if I use | <connection-url>jdbc:oracle:thin:@(description=(address_list=(load_balance=on)(failover=on)(address=(protocol=tcp)(h | ost=xxxxhost1)(port=1521))(address=(protocol=tcp)(host=xxxxhost2)(port=1521)))(connect_data=(service | _name=xxxxsid)(failover_mode=(type=select)(method=basic))))</connection-url> | then jboss complains that url-delimiter is not povided. I did use the same url when using </local-tx-datasource> but this still does not gives me failover. Whats the difference between <local-tx-datasource> and <ha-local-tx-datasource>? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4260280#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...