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https://issues.apache.org/jira/browse/KAFKA-7782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16747984#comment-16747984
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Lee Dongjin commented on KAFKA-7782:
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[~guozhang] [~hachikuji] Is this a bug, or configuring cleanup policy for 
`__consumer_offsets` should not be allowed? In fact, I found [a 
case|https://stackoverflow.com/questions/42546501/the-retention-period-for-offset-topic-of-kafka]
 which requires this feature.

If it is a bug, it seems like tagged with `needs-kip` with later target 
version. Could you have a look?

> cleanup policy for offsets topic should be configurable
> -------------------------------------------------------
>
>                 Key: KAFKA-7782
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7782
>             Project: Kafka
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 2.1.0
>            Reporter: Nir Barel
>            Priority: Major
>              Labels: windows
>
> Hi,
> For offsets topic there is no option to change the log cleanup policy from 
> compact to delete because it is set hard-coded in code here:
> [https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/coordinator/group/GroupCoordinator.scala#L68]
> The only way to override it is to alter the topic at runtime which required 
> to check the settings and set it after every restart of Kafka.
> I am suggesting to configure it via properties with a default value of 
> "compact"
>  



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