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https://issues.apache.org/jira/browse/KAFKA-6535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16354548#comment-16354548
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Guozhang Wang commented on KAFKA-6535:
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I think we cannot safely do that for user topics, since these topics maybe
shared by multiple applications, and some of them may not even be written in
Streams. Though admittedly in practice such sharing may not be common, but we
still cannot do that for sure.
> Set default retention ms for Streams repartition topics to infinity
> -------------------------------------------------------------------
>
> Key: KAFKA-6535
> URL: https://issues.apache.org/jira/browse/KAFKA-6535
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Guozhang Wang
> Priority: Major
> Labels: needs-kip, newbie
>
> After KIP-220 / KIP-204, repartition topics in Streams are transient, so it
> is better to set its default retention to infinity to allow any records be
> pushed to it with old timestamps (think: bootstrapping, re-processing) and
> just rely on the purging API to keeping its storage small.
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