Adjusting log4j in JBoss

JBoss' log4j configuration can be found at [server root]/server/default/conf/jboss-log4j.xml.

There are two important parts to tweaking your logging, the appender settings and limit categories.

The appender settings start on line 64 for jboss-4.2.2.GA. The default is :

   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Target" value="System.out"/>
     <param name="Threshold" value="INFO"/>

     <layout class="org.apache.log4j.PatternLayout">
        <!-- The default pattern: Date Priority [Category] Message\n -->
        <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n"/>
     </layout>
  </appender>

Mine look like this :

   <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
     <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
     <param name="Target" value="System.out"/>

     <layout class="org.apache.log4j.PatternLayout">
        <!-- The default pattern: Date Priority [Category] Message\n -->
        <param name="ConversionPattern" value="%-5p [%c{7}.%M] %m %n"/>

     </layout>
  </appender>

The difference is the ConversionPattern. Inside the brackets I use %c{7}.%M. That means that the class name will append 7 levels back, i.e. com.foo.bar.baz.buz.bam.SomeClass. The ".%M" appends the method name as well, i.e. com.foo.bar.baz.buz.bam.SomeClass.someMethod.

This way I can see the fully qualified class name and method.