web/WEB-INF/sun-web.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE sun-web-app PUBLIC '-//Sun Microsystems, Inc.//DTD Application Server 8.1 Servlet 2.4//EN' 'http://www.sun.com/software/appserver/dtds/sun-web-app_2_4-1.dtd'>

<sun-web-app>
    
    <session-config>
        <session-manager>
        </session-manager>
    </session-config>

    <resource-ref>
        <res-ref-name>jdbc/rollerdb</res-ref-name>
        <jndi-name>jdbc/rollerdb</jndi-name>
    </resource-ref>

</sun-web-app>