code: private void scheduleRenewalThresholdUpdateTask() {
          timer.schedule(new TimerTask() {
                             @Override
                             public void run() {
                                 updateRenewalThreshold();
                             }
                         }, serverConfig.getRenewalThresholdUpdateIntervalMs(),
                  serverConfig.getRenewalThresholdUpdateIntervalMs());
      }
docs: Schedule the task that updates <em>renewal threshold</em> periodically.
  The renewal threshold would be used to determine if the renewals drop
  dramatically because of network partition and to protect expiring too
  many instances at a time.