Specifies the type of logging that is to be used. The default implementation is the JDK option. This is the built-in Java logging called java.util.logging (JUL). The other logging options are log4j or logback. The syntax is:

gg.log={JDK|log4j|logback}

For example, to set the type of logging to log4j:

gg.log=log4j 

The log file is created in the report subdirectory of the installation. The default log file name includes the group name of the associated Extract and the file extension is log.