Not sure but - I don't think it is something to worry about. I have seen it often too. I looked up the source for WebappLoader and DelegatingClassLoader and it looks like the 'Unknown loader' message gets displayed because it tries to invoke 'getClasspath' on DelegatingClassLoader but it does not have this method.
http://www.docjar.com/html/api/org/apache/catalina/loader/WebappLoader.java.html
I'll forward to the web folks - maybe they can point us to more information how class loaders work in the web container.
----- Original Message -----
From: Joey Jarosz <joey_at_cadence.com>
Date: Thursday, April 23, 2009 5:13 pm
Subject: [embedded] ClassPath Question
To: embedded_at_glassfish.dev.java.net
> I am in the middle of cleaning up my classpaths as well as trying to get
> a better understanding of how the class loaders work in glassfish. I
> keep seeing the following message in my logs and was wonder 1) what does
> it really mean and 2) is it something I need to worry about?
>
>
>
> Apr 23, 2009 8:50:44 AM org.apache.catalina.loader.WebappLoader
> setClassPath
>
> INFO: Unknown loader
> org.glassfish.internal.api.DelegatingClassLoader_at_dce479 class
> org.glassfish.internal.api.DelegatingClassLoader
>
>
>
> As usual, thanks for any words of wisdom.
>
> Joey
>
>
>
> --------------------------------------------
> Joey Jarosz
>
> Senior Architect
>
> Chip Planning Solutions
>
> Cadence Design Systems, Inc.
> (408) 914-6269
>
>
> Need some IP? Check out www.chipestimate.com
> <
>
>
>