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https://issues.apache.org/jira/browse/KAFKA-6937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Rao resolved KAFKA-6937.
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Resolution: Fixed
Fix Version/s: 1.1.1
1.0.2
2.0.0
Merged the PR.
> In-sync replica delayed during fetch if replica throttle is exceeded
> --------------------------------------------------------------------
>
> Key: KAFKA-6937
> URL: https://issues.apache.org/jira/browse/KAFKA-6937
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.11.0.1, 1.1.0, 1.0.1
> Reporter: Jun Rao
> Assignee: Jun Rao
> Priority: Major
> Fix For: 2.0.0, 1.0.2, 1.1.1
>
>
> When replication throttling is enabled, in-sync replica's traffic should
> never be throttled. However, in DelayedFetch.tryComplete(), we incorrectly
> delay the completion of an in-sync replica fetch request if replication
> throttling is engaged.
> The impact is that the producer may see increased latency if acks = all. The
> delivery of the message to the consumer may also be delayed.
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