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https://issues.apache.org/jira/browse/KAFKA-20442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Jacot resolved KAFKA-20442.
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Fix Version/s: 4.4.0
Resolution: Fixed
> Consumer/Share/Streams group assignment epoch is not updated when the last
> member leaves
> ----------------------------------------------------------------------------------------
>
> Key: KAFKA-20442
> URL: https://issues.apache.org/jira/browse/KAFKA-20442
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 4.0.0, 4.1.0, 4.2.0, 4.3.0
> Reporter: David Jacot
> Assignee: David Jacot
> Priority: Major
> Fix For: 4.4.0
>
>
> When the last member of a consumer, share, or streams group leaves, the group
> epoch is bumped but no new target assignment is computed. This leaves the
> group in an inconsistent state where groupEpoch > assignmentEpocheven though
> the group is empty. The fix is to write a target assignment metadata record
> when the fence operation results in an empty group so that the assignment
> epoch catches up to the group epoch.
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