Using jakarta-commons threadpool (Tomcat) through JNDI

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Hello everyone!

*EDIT*: I just realized this might be the wrong forum for this question. Hopefully it will get moved.

I'm having some problems getting the jakarta-commons threadpool to work with Tomcat through JDNI. I'm attempting to make use of it from a Java servlet web application in Eclipse.

Prerequisites: I've downloaded the JDBC 2.0 optional package and my jdbc postgres driver are located inmy tomcat/common/lib directory.

Setup: I used tomcats official guide for setting up the server: The Apache Tomcat 5.5 Servlet/JSP Container - JNDI Datasource HOW-TO

I've set up the server.xml as defined in the above guide.

<Resource name="jdbc/TEST" auth="Container"
          type="javax.sql.DataSource" driverClassName="org.postgresql.Driver"
          url="jdbc:postgresql://127.0.0.1:5432/mydb"
          username="myuser" password="mypasswd" maxActive="20" maxIdle="10" maxWait="-1"/>

The connection info has been omitted here, but i have checked that it's accurate, and i can create nonpooled connections using this very connectionstring.

I've registered an external dependency for the application (in web.xml) which matches the resource defined in tomcat/conf/server.xml.

<resource-ref>
 <description>postgreSQL Datasource example</description>
 <res-ref-name>jdbc/TEST</res-ref-name>
 <res-type>javax.sql.DataSource</res-type>
 <res-auth>Container</res-auth>
</resource-ref>

I've registered a ServletContext listener in the application to initialize the context and lookup the connectionpool resource as defined in tomcat/conf/server.xml. I've double checked that all referenced resources haven't been misspelled.

package test;

import javax.servlet.*;
import javax.sql.*;
import javax.naming.*;

public class DBCPoolingListener implements ServletContextListener{
	
	public void contextInitialized(ServletContextEvent sce)
	{
        try {
			// Obtain environment naming context
			Context envCtx = (Context) new InitialContext().lookup("java:comp/env");

			// Look up data source
			DataSource  ds = (DataSource) envCtx.lookup("jdbc/TEST");
			
			sce.getServletContext().setAttribute("DBCPool", ds);
        } catch(NamingException e){ e.printStackTrace();
	}
}
	
	public void contextDestroyed(ServletContextEvent sce)
	{}
}

Whenever the context is initialized and it tries to look up the datasource "jdbc/TEST" it's null. The naming context lookup appears to be functioning. Should the lookup be throwing an exception in case the resource does not exist? Am i missing something here?

Hope there's enough information to understand the problem.
Thank you in advance!

Regards, Martin