From: <glassfish_at_javadesktop.org>
Date: Mon, 25 Aug 2008 23:22:17 PDT

I think the problem may be connection validateion.

http://blogs.sun.com/JagadishPrasath/entry/connection_validation_in_glassfish_jdbc

Most of the jdbc-drivers cache the "auto-commit" value of the
connection and hence actual validation (connecting to database) does not happen.

Now, I change it to table-based validation.
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