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Barry,

On 2/25/2010 4:26 PM, Propes, Barry L wrote:
> After reconfiguring, I seem to be getting this error too, now. For
> which a cursory search on Google seems to reveal many cases of this
> happening with various DB drivers, as well as different versions of
> Tomcat, from most recent to the 5x series.
>
> But no real solution found yet within those posts/forums. Still looking 
> though.
> 
> javax.servlet.ServletException: 
> org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of 
> class '' for connect URL 'null'

Ugh, that's the worst one IMO, because it doesn't offer any help for
what the problem actually is.

When this happens to people, I usually recommend:

1. Quadruple-check that you have your JDBC driver only in one place (in
Tomcat's /lib directory)
2. Remove all unnecessary configuration from your <Resource> element:
just (simple) URL, driver class, username and password, just to get
things started.

Good luck,
- -chris
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