docs: @Override
      public void appendFile(String groupName, String path, InputStream inputStream, long fileSize) {
          StorageNodeInfo client = trackerClient.getUpdateStorage(groupName, path);
          StorageAppendFileCommand command = new StorageAppendFileCommand(inputStream, fileSize, path);
          connectionManager.executeFdfsCmd(client.getInetSocketAddress(), command);
      }