@Override
  protected AbstractCompactionWriter getCompactionWriter(
      List<TsFileResource> seqFileResources,
      List<TsFileResource> unseqFileResources,
      List<TsFileResource> targetFileResources)
      throws IOException {
    return new RepairUnsortedFileCompactionWriter(targetFileResources.get(0));
  }
Used for fixing files which contains internal unsorted data
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/performer/impl/RepairUnsortedFileCompactionPerformer.java