mongodb 更新失败

WriteResult res = mongoTemplate.updateFirst(query, updateObj, "ServerToAgentReq_SMS");

private ThreadPoolExecutor exec = new ThreadPoolExecutor(2, 10, 3, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(10), new ThreadPoolExecutor.CallerRunsPolicy());

主要代码：

WriteResult res = mongoTemplate.updateFirst(query, updateObj, "ServerToAgentReq_SMS");

            //如果更新失败，进入其他线程重试更新

            if (res.getN() == 0) {

                exec.execute(new Runnable() {

                    @Override

                    public void run() {

                        int num = 0;

                        WriteResult res = mongoTemplate.updateFirst(query, updateObj, "ServerToAgentReq_SMS");

                        while (res.getN() == 0 && num < 100) {

                            res = mongoTemplate.updateFirst(query, updateObj, "ServerToAgentReq_SMS");

                            num++;

                            try {

                                Thread.sleep(300);

                            } catch (InterruptedException e) {

                                logger.error("响应更新失败{}", e);

                            }

                        }

                        if (res.getN() == 0) {

                            logger.error("响应更新失败!!!gwMsgId:{},masMsgId:{}", gwMsgId, masMsgId);

                        }

                    }

                });