Every now and then for debugging purposes we need to see what the container’s classloaders are doing. On this page we will list the configuration options for different containers.

JBoss

Assuming the “default” configuration is used.

Log4j configuration file:
JBOSS_HOME/server/default/conf/jboss-log4j.xml

Add a category to the configuration file:

JBOSS 4.2

<category name=”org.jboss.mx.loading”>
<priority value=”TRACE”/>
<appender-ref ref=”CONSOLE”/>
<appender-ref ref=”FILE”/>
</category>

JBOSS 4.0

<category name=”org.jboss.mx.loading”>
<priority value=”TRACE” class=”org.jboss.logging.XLevel” />
<appender-ref ref=”CONSOLE”/>
<appender-ref ref=”FILE”/>
</category>

See the log under:
JBOSS_HOME/server/default/log/server.log

Jetty 6

Start Jetty with the line
java -DDEBUG -DDEBUG_PATTERNS=org.mortbay.jetty.webapp -DDEBUG_VERBOSE=1 -jar start.jar