Debugger.scala

import org.apache.log4j.ConsoleAppender
import org.apache.log4j.PatternLayout
import org.apache.log4j.Logger

/* These are global for _all_ tests, this isn't optimal, but hadoop.
   Add Debugger.job or Debugger.detailed to your code to get lots
   of output. */
object Debugger {
  def job(): Unit =
    toConsole(Logger.getLogger("org.apache.hadoop.mapred.LocalJobRunner"))

  def detailed(): Unit =
    toConsole(Logger.getRootLogger)

  def toConsole(logger: Logger): Unit = {
    val layout = new PatternLayout("%-5p %c %x - %m%n");
    logger.addAppender(new ConsoleAppender(layout));
  }
}