private static void deleteCaches(@Nullable File dir) {
    if (dir != null && dir.exists()) {
      try {
        final boolean delete = FileUtil.delete(dir);
        if (!delete) {
          LOG.info("Failed deleting legacy caches");
        }
      }
      catch (Exception e) {
        LOG.info(e);
      }
    }
  }
private static void deleteCaches(@Nullable File dir)