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https://issues.apache.org/jira/browse/KAFKA-6780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635552#comment-16635552
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Dong Lin commented on KAFKA-6780:
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Moving this out to 2.2.0 since there is no PR yet.
> log cleaner shouldn't clean messages beyond high watermark
> ----------------------------------------------------------
>
> Key: KAFKA-6780
> URL: https://issues.apache.org/jira/browse/KAFKA-6780
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 1.1.0
> Reporter: Jun Rao
> Assignee: Anna Povzner
> Priority: Major
> Fix For: 2.2.0
>
>
> Currently, the firstUncleanableDirtyOffset computed by the log cleaner is
> bounded by the first offset in the active segment. It's possible for the high
> watermark to be smaller than that. This may cause a committed record to be
> removed because of an uncommitted record.
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