@Override
      public void run() {
        try {
          markBackgroundTaskThread(); // for bug 42775
          // getCache().getCachePerfStats().decDiskTasksWaiting();
          runnable.run();
        } finally {
          decBackgroundTasks();
        }
      }
Wait for any current operations in the delayed write pool. Completion of this method ensures
that the writes have completed or the pool was shutdown
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java