My JBoss server.log stops logging during the deployment of an application, right after some TRACE level output statements get printed. I suspect that some code is changing my logging configuration.  I would like to enable debug on the logging library(I understand is log4j) to see what is the cause. I have tried this following ways, but none appears to work:

1. adding -Dlog4j.debug=true to the startup line.

2. adding this snippet to standalone.xml

          <logger category="org.apache.log4j">

                <level name="DEBUG"/>

            </logger>

inside the  <subsystem xmlns="urn:jboss:domain:logging:1.2"> section.

3. Adding similar logging configuration in 2. to our own logging.

What is the proper way to enable debugging on the JBoss logging system?

Thanks.