[BUG] Stream lag seems to not be correctly replicated on slave

[Hackatosh]

Describe the bug

We use master/slave with sentinels architecture. We use the slaves to compute metrics about our usage of redis streams without hurting the performance of the master node.

We upgraded recently to Redis version 7, and we tried to use the lag field returned by the XINFO GROUPS command (https://redis.io/docs/latest/commands/xinfo-groups/) to compute our metrics, but its value seems incorrect on the slave. We can have of value of 0 on our master but have a value of more than 8000 on our slave.

Expected behavior

We expected lag field to be the same on both master and slave

Additional information

Redis Version : 7.2.5

[Hackatosh]

Is it related to f17381a ? 🤔

[sundb]

@Hackatosh likely, but it's not possible to determine from the info you gave, can you try 7.4rc1 in your development enviroment to verify it? thanks.