message may be lost because of slave can report greater than local commitLog offset in sync_mater mode

[makabakaboom]

BUG REPORT

1. Please describe the issue you observed:

• What did you do (The steps to reproduce)?

1、创建一个SYNC_MASTER模式的集群
2、创建一个连接去连接同步端口，并往里面随机写一些数据
3、master节点会当做是slave上报的offset，并更新push2SlaveMaxOffset，导致后续写入消息可能未等到slave同步就已经返回producer
4、此时master宕机可能就会造成部分数据写master成功，但是还未由pageCache写入到磁盘，且未同步到slave而丢失

• What did you expect to see?

1、判断为不合适的offset，并断掉连接

• What did you see instead?

master节点会当做是slave上报的offset，并更新push2SlaveMaxOffset，导致后续写入消息可能未等到slave同步就已经返回producer

2. Please tell us about your environment:

最新环境
3. Other information (e.g. detailed explanation, logs, related issues, suggestions how to fix, etc):

[areyouok]

这个问题我们也遇到，我们的解决办法是给主从同步的tcp连接增加一个握手，我认为这才是根本的解决办法。

不过这样一改就有点不兼容了，比如新旧版本的broker之间无法建立连接，所以这个修改我一直没提交。

[github-actions]

This issue is stale because it has been open for 365 days with no activity. It will be closed in 3 days if no further activity occurs.

[github-actions]

This issue was closed because it has been inactive for 3 days since being marked as stale.