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https://issues.apache.org/jira/browse/KAFKA-7899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Boyang Chen resolved KAFKA-7899.
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Resolution: Invalid
It appears that the metadata should be generated by the client instead of
broker. So basically this is invalid issue.
> Command line tool to invalidate group metadata for clean assignment
> -------------------------------------------------------------------
>
> Key: KAFKA-7899
> URL: https://issues.apache.org/jira/browse/KAFKA-7899
> Project: Kafka
> Issue Type: New Feature
> Components: consumer, streams
> Affects Versions: 1.1.0
> Reporter: Boyang Chen
> Assignee: Boyang Chen
> Priority: Major
>
> Right now the group metadata will affect consumers under sticky assignment,
> since it persists previous topic partition assignment which affects the
> judgement of consumer leader. Specifically for KStream applications (under
> 1.1), if we are scaling up the cluster, it is hard to balance the traffic
> since most tasks would still go to "previous round active" assignments, even
> though we hope them to move towards other hosts.
> It would be preferable to have a tool to invalidate the group metadata stored
> on broker, so that for sticky assignment we could have a clean start.
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