code: public void stopSyncPostJournal(AlluxioURI syncPoint) throws InvalidPathException {
      MountTable.Resolution resolution = mMountTable.resolve(syncPoint);
      long mountId = resolution.getMountId();
      // Remove initial sync thread
      Future<?> syncFuture = mSyncPathStatus.remove(syncPoint);
      if (syncFuture != null) {
        syncFuture.cancel(true);
      }
  
      if (mFilterMap.get(mountId).isEmpty()) {
        // syncPoint removed was the last syncPoint for the mountId
        mFilterMap.remove(mountId);
        Future<?> future = mPollerMap.remove(mountId);
        if (future != null) {
          future.cancel(true);
        }
      }
  
      // Tell UFS to stop monitoring the path
      try (CloseableResource<UnderFileSystem> ufs = resolution.acquireUfsResource()) {
        ufs.get().stopSync(resolution.getUri());
      } catch (IOException e) {
        LOG.info("Ufs IOException for uri {}, exception is {}", syncPoint, e);
      }
  
      // Stop active sync polling on a particular UFS if it is the last sync point
      if (mFilterMap.containsKey(mountId) && mFilterMap.get(mountId).isEmpty()) {
        try (CloseableResource<UnderFileSystem> ufs = resolution.acquireUfsResource()) {
          ufs.get().stopActiveSyncPolling();
        } catch (IOException e) {
          LOG.warn("Encountered IOException when trying to stop polling thread {}", e);
        }
      }
    }
docs: Clean up tasks to stop sync point after we have journaled.
  
  @param syncPoint the sync point to stop
  @throws InvalidPathException