public void countDownIndexUpdaters() {
    synchronized (indexes) {
      --numUpdatersInProgress;
      // Asif: Since Index creator threads can progress only if
      // there is no update threads in progress, thus we need to issue
      // notify all iff there are any creator threads in action & also
      // if the upDateInProgress Count has dipped to 0
      if (numUpdatersInProgress == 0 && numCreators > 0) {
        indexes.notifyAll();
      }
    }
  }
Necessary finally block call for above method.
geode-core/src/main/java/org/apache/geode/cache/query/internal/index/IndexManager.java