docs: private static void initScheduledExecutorService(){
  		logger.info("daemon:{},poolSize:{}",daemon,poolSize);
  		scheduledExecutorService =  Executors.newScheduledThreadPool(poolSize,new ThreadFactory() {
  
  			@Override
  			public Thread newThread(Runnable arg0) {
  				Thread thread = Executors.defaultThreadFactory().newThread(arg0);
  				//设置守护线程
  				thread.setDaemon(daemon);
  				return thread;
  			}
  		});
  	}