@Override public void notifyHeartbeatStop(){
  _isHeartbeatActive=false;
  _startSequenceId.incrementAndGet();
  clearRecycle();
  toFail();
}

@ Override public void notifyHeartbeatStop ( ) { _isHeartbeatActive = false ; _startSequenceId . incrementAndGet ( ) ; clearRecycle ( ) ; toFail ( ) ; }
notify that a heartbeat stop has occurred .
