public void incRequestInProgress(int threads) {
    if (_stats != null) {
      _stats.incInt(_REQUESTS_IN_PROGRESS, threads);
    } else {
      requestsInProgress.getAndAdd(threads);
    }
  }
Called when the DS comes online so we can hookup the stats
geode-core/src/main/java/org/apache/geode/distributed/internal/LocatorStats.java