public void stop()
   {
      log.info("Stopping PostResult2Qc thread executor.....");
      try {
         postResult2QcThreadExecutor.interrupt();
         postResult2QcThreadExecutor.join();
         log.info("PostResult2Qc thread executor stopped successfully");
      } catch (Exception ex) {
         log.error("Got an exception while stopping the thread executor :", ex);
      }
   }