优雅停机

 /**
     * 进程关闭时候清理业务数据
     */
    private void addShutdownHook() {
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            log.info(LOG_PRE + "进程即将退出，清理本次启动申请的zk资源");
            updateWorkerNodeInfo(null);
            zookeeperClient.deleteNode(workerIdAllocator.getWorkerNodePath() + SESSION_NODE);
            if (null != scheduler) {
                scheduler.shutdown();
            }
        }));
    }