message: log an error when a heartbeat is rejected
diff: @@ -216,6 +216,7 @@ class HeartBeatWorker(threading.Thread):
  state_record.set_state(State.DONE)
  elif state == "reject":
  + LOG.error("hearbeat rejected")
  state_record.set_state(State.DONE)
  elif state == "round":
  