private void forceCloseWriterManager(String uuid) {
    final TsFileWriterManager writerManager = uuid2WriterManager.remove(uuid);
    if (Objects.nonNull(writerManager)) {
      writerManager.close();
    }
  }
{@link LoadTsFileManager} is used for dealing with {@link LoadTsFilePieceNode} and {@link
LoadCommand}. This class turn the content of a piece of loading TsFile into a new TsFile. When
DataNode finish transfer pieces, this class will flush all TsFile and load them into IoTDB, or
delete all.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/load/LoadTsFileManager.java