Enable debug logging on glassfish?

[healeyb]

I'm trying to find out what's causing these messages: WARN: Cannot attempt extension on null.
I saw a post with some logging from org.jboss.seam.faces.environment.SeamApplicationWrapper,
can anyone tell me how to do this on a Glassfish server it's be helpful. I've looked in the
FAQ to no avail.

Thanks.

[lightguard]

Logging in glassfish is done using java.util.logging. There's a logging.properties file in the domain config (IIRC) that you can setup.