Here is the datasource definition we are using: <datasources> | <local-tx-datasource> | <jndi-name>DefaultDS</jndi-name> | <connection-url>jdbc:oracle:thin:@localhost:1521:orcl</connection-url> | <driver-class>oracle.jdbc.driver.OracleDriver</driver-class> | <user-name>tas</user-name> | <password>tas</password> | | <!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the pool --> | | <!--valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name--> | <!-- Checks the Oracle error codes and messages for fatal errors --> | <exception-sorter-class-name> | org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name> | <new-connection-sql>select 1 from dual</new-connection-sql> | <check-valid-connection-sql>select 1 from dual</check-valid-connection-sql> | <track-statements>true</track-statements> | <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> | <metadata> | <type-mapping>Oracle9i</type-mapping> | </metadata> | <max-pool-size>30</max-pool-size> | </local-tx-datasource> | | </datasources> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961181#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...