In my web service, I need to access Oracle database, so I created the oracle-ds.xml file in my deploy directory like this:
<?xml version="1.0" encoding="UTF-8"?>


<local-tx-datasource>
<jndi-name>hhsDB</jndi-name>
<connection-url>jdbc:oracle:thin:@aadv1db.abcd.com:1521:aadv1</connection-url>
<driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
<user-name>sim</user-name>
sim
<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>

<type-mapping>Oracle10g</type-mapping>

</local-tx-datasource>


And in my code I have this function to get connection for me:
private Connection getConnection() throws Exception {

InitialContext initialContext = new InitialContext();
javax.sql.DataSource ds = (javax.sql.DataSource) initialContext.lookup("java:hhsDB");
java.sql.Connection conn = ds.getConnection();
return conn;
}

But it keeps giving me "java.sql.SQLException: Already closed", even after I removed those .close() calls from my code... What should I do?