I ran into the some problems a while back when setting up connection pooling on Tomcat on Gentoo. It turned out that this was a known issue to Gentoo when using the Gentoo packages.
To remedy this, I had to do:
# cd /usr/share/tomcat-6/lib # ln -s /usr/share/commons-dbcp/lib/commons-dbcp.jar
And override the data source factory in the
Resource definitions in my
instead of the default: