If Monolog is configured to use the JDK logger it will replace the JDK logger implementation with its own implementation and so all JDK logs are intercepted by Monolog. By default Monolog is configured to use the JDK logger.

There is no special configuration file for Jakarta commons login.If it is used on top of the java logging API it is the same case than the previous section.

JOnAS don't provide the corresponding jar file so, log4j must be packaged (.jar file and log4j.properties) in any application that want to use it. The log4j.properties file must be configured correctly.

If log4j is used by several applications it is possible to centralize the log4j configuration by putting log4j.properties in $JONAS_BASE/conf and log4j jar file in $JONAS_BASE/lib/commons.