// First find servers hosting the segment in a ONLINE state.
      List<URI> peerSegmentURIs = PeerServerSegmentFinder.getPeerServerURIs(segmentName, downloadScheme, _helixManager);
      // Next download the segment from a randomly chosen server using configured scheme.
      SegmentFetcherFactory.getSegmentFetcher(downloadScheme).fetchSegmentToLocal(peerSegmentURIs, segmentTarFile);

@Override
  public void fetchSegmentToLocal(List<URI> uris, File dest)
      throws Exception {
    if (uris == null) {
      throw new IllegalArgumentException("The input uri list is empty");
    }
    Random r = new Random();
    RetryPolicies.exponentialBackoffRetryPolicy(_retryCount, _retryWaitMs, _retryDelayScaleFactor).attempt(() -> {
      URI uri = uris.get(r.nextInt(uris.size()));