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https://issues.apache.org/jira/browse/KAFKA-17733?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Jacot resolved KAFKA-17733.
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Fix Version/s: 4.0.0
Resolution: Fixed
> Protocol upgrade should allow empty member assignment in group conversion
> -------------------------------------------------------------------------
>
> Key: KAFKA-17733
> URL: https://issues.apache.org/jira/browse/KAFKA-17733
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Dongnuo Lyu
> Assignee: Dongnuo Lyu
> Priority: Major
> Fix For: 4.0.0
>
>
> During conversion from classic to consumer group, if a member has empty
> assignment (e.g., the member just joined and has never synced), the
> conversion will fail because of the buffer underflow error when deserializing
> the member assignment.
> We should allow empty assignment while deserializing the member assignment.
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