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https://issues.apache.org/jira/browse/KAFKA-18751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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José Armando García Sancio resolved KAFKA-18751.
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Resolution: Fixed
> Complete delayed FETCH request when HWM is increased.
> -----------------------------------------------------
>
> Key: KAFKA-18751
> URL: https://issues.apache.org/jira/browse/KAFKA-18751
> Project: Kafka
> Issue Type: Improvement
> Components: kraft
> Reporter: José Armando García Sancio
> Assignee: José Armando García Sancio
> Priority: Major
> Fix For: 4.1.0
>
>
> It is possible for HWM propagation to get delayed if the the HWM is increased
> and there are no new data in the log.
> One solution to this problem is for the leader to track the last HWM sent to
> the replicas and immediately reply to FETCH request if the HWM is greater
> than the previously sent HWM.
>
> One issue with this solution is that the leader doesn't have a reliable way
> of determining that an empty FETCH response made it to the remote replica.
> This can be address if the FETCH request also include the remotes replica HWM.
>
>
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