code: @Override
    public void resetState() {
      for (long mountId : mFilterMap.keySet()) {
        try {
          // stops sync point under this mount point. Note this clears the sync point and
          // stops associated polling threads.
          stopSyncForMount(mountId);
        } catch (IOException | InvalidPathException e) {
          LOG.info("Exception resetting mountId {}, exception: {}", mountId, e);
        }
      }
    }
docs: {@inheritDoc}
  
  It clears all sync points, and stops the polling thread.