JBoss uses Log4j wrapped in an MBean as a logging service. This means that an independent logging library does not need to be bundled with the application.

All logging configuration is done in the <JBdir>/server/configdir/conf/jboss-log4j.xml file. For more information on Log4j, see http://logging.apache.org/log4j/docs/manual.html.

You can adjust class specific logging in the category elements toward the end of the log4j configuration file. Each category can have a priority assigned to it. For example:

<category name="org.jboss">
   <priority value="DEBUG" />
   <appender-ref ref="FILE"/>
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