From: <glassfish_at_javadesktop.org>
Date: Mon, 21 Jun 2010 09:56:00 PDT

You need to remove the resources for undeploy to succeed.
You can use --cascade=true for "undeploy" command to remove all of the resources.
http://docs.sun.com/app/docs/doc/820-4332/undeploy-1?l=en&a=view
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