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https://issues.apache.org/jira/browse/KAFKA-5441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16049349#comment-16049349
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Guozhang Wang commented on KAFKA-5441:
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I see it is not a blocker for 0.11.0.0, but I can still take a quick look at it.
> Fix transaction marker grouping by producerId in TC
> ---------------------------------------------------
>
> Key: KAFKA-5441
> URL: https://issues.apache.org/jira/browse/KAFKA-5441
> Project: Kafka
> Issue Type: Sub-task
> Components: clients, core, producer
> Reporter: Jason Gustafson
> Labels: exactly-once
> Fix For: 0.11.0.1
>
>
> It seems in some cases the WriteTxnMarker request can be sent with multiple
> entries for the same ProducerId. This is the cause of KAFKA-5438. This is not
> necessarily a correctness problem, but it seems unintentional and should
> probably be fixed.
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