private FileStatus[] listFilesInDir(Path path) throws IOException {
    return dataFileSystem.listStatus(path, p -> {
      String name = p.getName();
      return !name.startsWith("_") && !name.startsWith(".");
    });
  }
This writes the actual data in the exportRootDataDir from the source.
ql/src/java/org/apache/hadoop/hive/ql/parse/repl/dump/io/FileOperations.java