@Override
 protected void doStart() {
   log.trace("ReservationCacheImpl.doStart()");
   try {
     schedulerService.startAsync().awaitRunning();
     cacheCleanupSchedule =
         schedulerService.scheduleAtFixedRate(cleanUpCacheRunnable, 1, 1, TimeUnit.MINUTES);
     notifyStarted();
   } catch (Exception e) {
     notifyFailed(e);
   }
 }