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Posted to dev@kafka.apache.org by "Jun Rao (JIRA)" <ji...@apache.org> on 2018/05/25 23:35:00 UTC

[jira] [Resolved] (KAFKA-6937) In-sync replica delayed during fetch if replica throttle is exceeded

     [ https://issues.apache.org/jira/browse/KAFKA-6937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jun Rao resolved KAFKA-6937.
----------------------------
       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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