docs: public void shutdown() throws Exception {
  		Throwable firstException = null;
  
  		try {
  			scheduledExecutorService.shutdownNow();
  		} catch (Throwable t) {
  			firstException = t;
  		}
  
  		libraryCacheManager.shutdown();
  		stackTraceSampleCoordinator.shutDown();
  		backPressureStatsTracker.shutDown();
  
  		if (firstException != null) {
  			ExceptionUtils.rethrowException(firstException, "Error while shutting down JobManager services");
  		}
  	}