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https://issues.apache.org/jira/browse/KAFKA-559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698307#comment-13698307
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Joel Koshy commented on KAFKA-559:
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One additional recommendation: support a --dry-run option.
> Garbage collect old consumer metadata entries
> ---------------------------------------------
>
> Key: KAFKA-559
> URL: https://issues.apache.org/jira/browse/KAFKA-559
> Project: Kafka
> Issue Type: New Feature
> Reporter: Jay Kreps
> Assignee: Tejas Patil
> Labels: project
>
> Many use cases involve tranient consumers. These consumers create entries
> under their consumer group in zk and maintain offsets there as well. There is
> currently no way to delete these entries. It would be good to have a tool
> that did something like
> bin/delete-obsolete-consumer-groups.sh [--topic t1] --since [date]
> --zookeeper [zk_connect]
> This would scan through consumer group entries and delete any that had no
> offset update since the given date.
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