public void getConfigNodeHeartBeat(
      TEndPoint endPoint,
      TConfigNodeHeartbeatReq heartbeatReq,
      ConfigNodeHeartbeatHandler handler) {
    try {
      clientManager.borrowClient(endPoint).getConfigNodeHeartBeat(heartbeatReq, handler);
    } catch (Exception ignore) {
      // Just ignore
    }
  }
Only used in LoadManager

@param endPoint The specific ConfigNode
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/client/async/AsyncConfigNodeHeartbeatClientPool.java