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WXzhongwang avatar WXzhongwang commented on June 16, 2024 1

这种情况是考虑是回滚redis数据还是增加ack时间。感觉都不是太好。盼回复

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bootsrc avatar bootsrc commented on June 16, 2024

我觉得应该回滚redis数据。 毕竟增加ack时间，这个会导致mq消息大量积压，拖垮系统。

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myhearis avatar myhearis commented on June 16, 2024

这里我也发现是有bug的，因为浏览器是通过接口去轮询，而作者写的轮询接口逻辑是这样的：1、先查看秒杀成功的商品set集合中是否存在用户手机号，存在，返回秒杀成功。不存在，则判断redis中推送成功的消息set集合，这里是重点！当你ack超时，但是却成功推送到了MQ中，将不会记录到Redis中！于是在redis中找不到推送成功的记录（实际上已经推送成功了），于是给浏览器返回秒杀失败，但是实际上已经成功了！这是问题所在，解决这个问题有我觉得有这些方法，1、完善这个请求秒杀状态的接口，及时将推送成功信息写入redis中。2、适当增加等待ack的时间，如指数退避算法。3、没有接收到ack请求的，一律忽略，不进行后面的逻辑处理，这样返回秒杀失败也合情合理

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