public static String initHiveExecLog4j()
    throws LogInitializationException {
    return initHiveLog4jCommon(HiveConf.ConfVars.HIVE_EXEC_LOG4J_FILE);
  }
Initialize log4j for execution mode.

@return an message suitable for display to the user
@throws LogInitializationException if log4j-exec fails to initialize correctly
common/src/java/org/apache/hadoop/hive/common/LogUtils.java