code: public static void main(String argv[]) throws Exception {
      StringUtils.startupShutdownMessage(UtilizationCollector.class, argv, LOG);
      try {
        Configuration conf = new Configuration();
        UtilizationCollector collector = new UtilizationCollector(conf);
        if (collector != null) {
          collector.join();
        }
      } catch (Throwable e) {
        LOG.error(StringUtils.stringifyException(e));
        System.exit(-1);
      }
    }
docs: main program to run on the Collector server