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https://issues.apache.org/jira/browse/KAFKA-13091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson resolved KAFKA-13091.
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Fix Version/s: 3.0.1
Resolution: Fixed
> Increment HW after shrinking ISR through AlterIsr
> -------------------------------------------------
>
> Key: KAFKA-13091
> URL: https://issues.apache.org/jira/browse/KAFKA-13091
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Priority: Major
> Fix For: 3.0.1
>
>
> After we have shrunk the ISR, we have an opportunity to advance the high
> watermark. We do this currently in `maybeShrinkIsr` after the synchronous
> update through ZK. For the AlterIsr path, however, we cannot rely on this
> call since the request is sent asynchronously. Instead we should attempt to
> advance the high watermark in the callback when the AlterIsr response returns
> successfully.
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