log4j initialization

error: log4j:WARN No appenders could be found for logger (slideselector.facedata.FaceDataParser). log4j:WARN Please initialize the log4j system properly. paramter to vm log4j will look for log4j.properties on the classpath.

java -Dlog4j.configuration= log4j.properties

or enable debug level:

-Dlog4j.debug

References: http://stackoverflow.com/questions/1140358/how-to-initialize-log4j-properly