From: <glassfish_at_javadesktop.org>
Date: Mon, 08 Sep 2008 16:14:13 PDT

I've resolved adding this line to the sun-web.xml

<class-loader extra-class-path="jboss-el.jar" delegate="true"/>

Maybe these links can be helpful to others like me getting the same kind of error:
http://blogs.sun.com/sivakumart/entry/classloaders_in_glassfish_an_attempt.
http://docs.sun.com/app/docs/doc/819-3672/beade?l=it&a=view

However this solution is specific to glassfish. I wonder if there is a portable way to adjust the classpath of the classloader which get activated at deployment time.
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