code: private static void createBlockFile(String blockPath) throws IOException {
      FileUtils.createBlockPath(blockPath,
          ServerConfiguration.get(PropertyKey.WORKER_DATA_FOLDER_PERMISSIONS));
      FileUtils.createFile(blockPath);
      FileUtils.changeLocalFileToFullPermission(blockPath);
      LOG.debug("Created new file block, block path: {}", blockPath);
    }
docs: TODO(peis): Consider using domain socket to avoid setting the permission to 777.