From: <glassfish_at_javadesktop.org>
Date: Tue, 22 May 2007 07:14:17 PDT

I guess, jdbc driver is not available.

http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html
You may have to copy the driver to $CATALINA_HOME/common/lib as specified in the above URL.

If it doesn't work, you can post it to apache forums.
http://jakarta.apache.org/commons/dbcp/mail-lists.html
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