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View Code? Open in Web Editor NEW基于 Springboot + Redis + Kafka 的秒杀系统，乐观锁 + 缓存 + 限流 + 异步，TPS 从 500 优化到 3000
Home Page: https://gongfukangee.github.io/2019/06/09/SecondsKill
License: MIT License
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learn-knowlege fuchen1995 hecheng64 zack-sys normalzhou lhw6509650 nb216ers riluozhiguophp djltzx saberxsaber syuat lesliedou zxycoder guozi wangzhijian zuiwengf geekcoding-stack zyk1995 pangziwudi nmy654362860 star00-moon lazy-s bjh312 yangzilong1986 haha78 455616802 tianshenglong daocaoren1992 hi-ernest hsongx eagle-gu thinker1017 shenxinquan guojing-code zhangzhuzi fanwentao-felix doit01 huxingxing515717 harrywfl rose312 cherrymelon xueyi178 macliu-01 sumingyue tom12254 xk59740 wwj5921 yu1785 kbocbres nevermorecc zman-hz tolryg xuan-yin banhongshan bxclib2 woyaofuwu 18255004096 fancyfff authorcamus changsongyang sharingjoin yifan1003 lyl-94 wjdz99 haitaohaitao laashub-soa rongyi234 cnsxeq shuaidetuowangsu yuhenlei wangning123456 samshuaiyuan heartshare kpaxer ymh-ymh lsy6451795 mikechencc yinsamasa googlelee adolfpan gongyangyu xiao-mading githubjbj lpy1214 zhangchangminggo jackdangca tanbinh123 dewitso freedream520 bellmit poundhu guoyuhong123456789 958328814 jj-star-github uuttxt mars2022-begin nebula-yzh danielzhou888 zhouhesheng hai0378seconds-kill's Issues
包名有问题啊
大小写的问题
com.daydreamdev.secondskill.common.Limit
com.daydreamdev.secondskill.common.StockWithRedis
并发问题
请教一下，您写的（限流 + Redis 缓存库存 + KafkaTest 异步下单）这个接口在kafka发送消息到topic时，高并发的情况下会在redis中重复读到同一个版本号，到了消费者那里拿到版本号对应着数据库的进行更新会抛乐观锁的并发异常导致内容无法被消费，请问怎么解决
缓存一致性，先更新数据库在更新缓存
A线程更新完数据库，然后时间片给线程B了，这时B线程刚开始请求（拿到的是最新的版本号），更新完数据库和缓存，这时A再去更新缓存。这时不会发生不一致吗。
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