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https://issues.apache.org/jira/browse/KAFKA-19539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18009401#comment-18009401
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Matthias J. Sax commented on KAFKA-19539:
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Sure. Go ahead. I did not plan to pick it up any time soon anyway :)
> Kafka Streams should also purge internal topics based on user commit requests
> -----------------------------------------------------------------------------
>
> Key: KAFKA-19539
> URL: https://issues.apache.org/jira/browse/KAFKA-19539
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Matthias J. Sax
> Priority: Major
>
> Based on
> [https://stackoverflow.com/questions/79712093/kafka-streams-application-does-not-purge-repartition-topic-records-when-manual-c]
> Kafka Streams seems to use "delete record request" for internal topic only on
> regular commit via `commit.interval.ms`.
> However, if `commit.interval.ms` is set to a very high value, and users
> request commits manually via `context.commit()` no purging happens.
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