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Tomcat can't find my JDBC Resource !!!

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org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'

Is the error I get.

When they compiled the latest �stable� Tomcat, did they bother to test it before putting it out?

I looke through the entire google, and through this entire list, and I found lots of people having this problem. Yet, I didn�t find any solutions (that worked for me that is).

Basically, here�s what I have:

I�m running Tomcat 5.0.27 on Java 1.5 beta 2; I am using MySQL 4.1.2

Inside /common/lib/ I have mysql-connector.jar which is 3.0.14 � production version.

Inside my server.xml I have (relevant stuff):

<Host appBase="/home/resk/web" name="resk" autoDeploy="true" unpackWARs="true" liveDeploy="true">


Inside my /conf/Catalina/resk I have resk.xml:

<?xml version='1.0' encoding='utf-8'?>

<Context debug="5" displayName="RESK" docBase="ROOT" // BY THE WAY I also tried /home/resk/web/ROOT

path="/" reloadable="false">

<Environment name="data.source.name" type="java.lang.String" value="java:comp/env/jdbc/RESK"/> // BTW I tried without this line

<Resource auth="Container" name="jdbc/RESK"


<ResourceParams name="jdbc/RESK">











































Inside my /home/resk/web/ROOT/WEB-INF/ I have web.xml (relevant stuff):

<web-app version="2.4"




http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >


<description>DB Connection</description>





<!-- Used for startup primarly. Kepping things in one place. -->






Now, here�s how I load the data source (relevant part of the class):

public class Manager


DataSource ds;

static Manager instance;

private Manager()




// This is all the web.xml properties

InitialContext context = new InitialContext();

dbDataSource = (String)context.lookup("java:comp/env/data.source.name");

ds = (DataSource) new InitialContext().lookup(dbDataSource);


catch ( NamingException e )


Logger.getLogger("problem").fatal("Unable to load database data source!",e);

ds = null; // This will throw enough exceptions to notice the problem




* @return instance of the Manager.


public static Manager getInstance()


if (instance == null) instance = new Manager();

return instance;



* @return Connection from the pool. Make sure to close it when done.


public synchronized Connection getConnection() throws SQLException


return ds.getConnection();



Now, interesting thing to note. If I look at my catalina_log.2004-07-11.txt, I will find the following:

2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Resource parameters for jdbc/RESK = ResourceParams[name=jdbc/RESK, parameters={url=jdbc:mysql://, maxIdle=2, maxActive=10, driverClassName=com.mysql.jdbc.Driver, maxWait=10000, removeAbandoned=true, username=resk, factory=org.apache.commons.dbcp.BasicDataSourceFactory, removeAbandonedTimeout=60, password=RESK}]

2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Adding resource ref jdbc/RESK

2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: ResourceRef[className=javax.sql.DataSource,factoryClassLocation=null,factoryClassName=org.apache.naming.factory.ResourceFactory,{type=scope,content=Shareable},{type=auth,content=Container},{type=url,content=jdbc:mysql://},{type=maxIdle,content=2},{type=maxActive,content=10},{type=driverClassName,content=com.mysql.jdbc.Driver},{type=maxWait,content=10000},{type=removeAbandoned,content=true},{type=username,content=resk},{type=factory,content=org.apache.commons .dbcp.BasicDataSourceFactory},{type=removeAbandonedTimeout,content=60},{type=password,content=RESK}]

2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Adding environment entry data.source.name

2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Resource parameters for UserTransaction = null

Looking through this stuff it�s obvious that my resource IS found, and that it IS loaded. Yet, somehow, My application does not see it�

Anybody knows why? Any help will be greatly appreciated�
I don't get it. A whale wearing overalls? How does that even work? It's like a tiny ad wearing overalls.
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
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