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https://issues.apache.org/jira/browse/KAFKA-19497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18005139#comment-18005139
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zhu zhe commented on KAFKA-19497:
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Hi [~kevinwu2412], if you're not working on this issue.
May I take it?
> Topic replay code does not handle creation and deletion properly if it occurs
> in the same batch
> -----------------------------------------------------------------------------------------------
>
> Key: KAFKA-19497
> URL: https://issues.apache.org/jira/browse/KAFKA-19497
> Project: Kafka
> Issue Type: Bug
> Reporter: Kevin Wu
> Assignee: Kevin Wu
> Priority: Major
> Fix For: 4.2.0
>
>
> There is a small logic bug in topic replay. If a topic is created and then
> removed before the TopicsDelta is applied, we end up with the deleted topic
> in {{createdTopics}} on the delta but not in deletedTopicIds. I think we are
> extremely unlikely to see this since MetadataLoader will apply the delta for
> each batch of records it receives. Since it’s impossible to see a TopicRecord
> and RemoveTopicRecord in the same batch, the only way this could surface is
> if MetadataLoader did some buffering.
> {{}}
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