There are two ways to modify logging for your Discovery Framework components.
From a developer's perspective, you will most frequently need to adjust a logging verbosity level for a given class or class hierarchy. The easiest way to do this is through the Liferay Control Panel. If you need to modify logging in a more complex manner, or want to change default settings, you can modify the portal-log4j-ext.xml.
Both of these methods are described in this section.