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https://issues.apache.org/jira/browse/KAFKA-2913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15033135#comment-15033135
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ASF GitHub Bot commented on KAFKA-2913:
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Github user asfgit closed the pull request at:
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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