private static void stopProctor() {
    Thread proctorSnapshot;
    synchronized (failureSync) {
      stopping = true;
      proctorSnapshot = proctor;
    }
    if (proctorSnapshot != null && proctorSnapshot.isAlive()) {
      proctorSnapshot.interrupt();
      try {
        proctorSnapshot.join(SHUTDOWN_WAIT);
      } catch (InterruptedException ignore) {
      }
    }
  }
Start the proctor thread, if it isn't already running.

@see #proctor
geode-core/src/main/java/org/apache/geode/SystemFailure.java