onWorkerStart里启动定时器一段时间后有连接执行2次的现像?

    public static function onWorkerStart($worker) {

        //启动心跳检测定时器
        Timer::add(5, function(){

            echo '__start Timer' . "\n";
            foreach (self::$heartList as $key => $value) { 
                echo '22--' . "\n";
                if (self::$heartList < 1) {
                } else { //重置处理
                }
            }
        });
    }

    if($worker->id === 0) { 
        Timer::add(30.0, function(){