public void markHandshakeFinished() {
    isHandshakeFinished.set(true);
    LOGGER.info("Handshake finished for client {}", this);
  }
return self, the method doesn't need to be called by the user and will be triggered after the
RPC is finished.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/client/async/AsyncPipeDataTransferServiceClient.java