private void statistics() {

    if (this.statisticsCount >= 4294967296L) {
      this.statisticsCount = 0;
    } else {
      this.statisticsCount++;
    }

    if (this.statisticsCount % 100 == 0) {
      if (executorService != null) {
        LOG_STATISTICS.info("statistics[thread]:" + executorService.toString());
      }
      Collection<GearmanJobServerSession> sessions = sessionMap.values();
      for (GearmanJobServerSession session : sessions) {
        LOG_STATISTICS.info(
            "statistics[task]:"
                + session.toString()
                + " ActiveTasks:"
                + session.getNumberOfActiveTasks());
      }
    }
  }