Getting stacktrace in logger
You have to use the two argument form
log.error("my logging message", exception)See http://www.devdaily.com/blog/post/java/how-print-exception-stack-trace-using-log4j-commons for more details.
It is actualy log4j that prevents the printing of the fulltime stacktrace. You should however set the exception as a second parameter for the error method.