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https://issues.apache.org/jira/browse/KAFKA-7680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716273#comment-16716273
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Jun Rao commented on KAFKA-7680:
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[~NIzhikov], thanks for your interest. Feel free to assign the Jira to yourself.
> fetching a refilled chunk of log can cause log divergence
> ---------------------------------------------------------
>
> Key: KAFKA-7680
> URL: https://issues.apache.org/jira/browse/KAFKA-7680
> Project: Kafka
> Issue Type: Bug
> Reporter: Jun Rao
> Priority: Major
>
> We use FileRecords.writeTo to send a fetch response for a follower. A log
> could be truncated and refilled in the middle of the send process (due to
> leader change). Then it's possible for the follower to append some
> uncommitted messages followed by committed messages. Those uncommitted
> messages may never be removed, causing log divergence.
>
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