@Override
  public synchronized void playDead() {
    if (!playingDead) {
      playingDead = true;
      logger.info("GroupMembershipService.playDead invoked for {}", address);
      services.getJoinLeave().playDead();
      services.getHealthMonitor().playDead();
      services.getMessenger().playDead();
    }
  }
Test hook - don't answer "are you alive" requests
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/GMSMembership.java