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https://issues.apache.org/jira/browse/KAFKA-2913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang resolved KAFKA-2913.
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Resolution: Fixed
Fix Version/s: 0.9.0.1
Issue resolved by pull request 605
[https://github.com/apache/kafka/pull/605]
> GroupMetadataManager unloads all groups in removeGroupsForPartitions
> --------------------------------------------------------------------
>
> Key: KAFKA-2913
> URL: https://issues.apache.org/jira/browse/KAFKA-2913
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Fix For: 0.9.0.1
>
>
> In GroupMetadataManager.removeGroupsForPartition, we currently remove all
> groups from the cache, but we should only be removing groups for the
> respective partition. This will cause an unneeded rebalance for groups
> mistakenly removed. And since the generation would reset to 0 in this case,
> the offsets from the current generation would be rejected and the consumer
> would see duplicates.
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