[rules-users] How to enable logging in my application?

I want to enable logging in my application. Since Drools planner uses log4j, how can I enable it's logging in my application? In the current form, my application runs as: jesvin@Jesvin-Technovia:~/dev/drools/sudoku$ java in.co.technovia.sudoku.App log4j:WARN No appenders could be found for logger (org.drools.planner.core.solver.DefaultSolver). log4j:WARN Please initialize the log4j system properly. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-enable-logging-in-my-application... Sent from the Drools: User forum mailing list archive at Nabble.com.