[jira] [Created] (KAFKA-19497) Topic replay code does not handle creation and deletion properly if it occurs in the same batch

[Kevin Wu (Jira)]

Kevin Wu created KAFKA-19497:
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             Summary: 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
             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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