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https://issues.apache.org/jira/browse/KAFKA-5056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16734850#comment-16734850
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ASF GitHub Bot commented on KAFKA-5056:
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hachikuji commented on pull request #2843: KAFKA-5056: Add shuffling of
FetchRequest requestInfo back to old consumer
URL: https://github.com/apache/kafka/pull/2843
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> Shuffling of partitions in old consumer fetch requests removed
> --------------------------------------------------------------
>
> Key: KAFKA-5056
> URL: https://issues.apache.org/jira/browse/KAFKA-5056
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.1.0
> Reporter: Todd Palino
> Assignee: Todd Palino
> Priority: Major
>
> [KIP-74|https://cwiki.apache.org/confluence/display/KAFKA/KIP-74%3A+Add+Fetch+Response+Size+Limit+in+Bytes]
> deprecated the constructor to {{FetchRequest}} which shuffles the
> {{requestInfo}} parameter, in favor of round robin reordering logic added to
> the replica fetcher and the consumer API. However, this was not added to the
> old consumer {{ConsumerFetcherThread}}, which has resulted in unfair
> partition fetching since 0.10.1.
> In order to maintain the old consumer, we need to add the removed shuffle to
> {{buildFetchRequest}} as the topic-partition list for each {{FetchRequest}}
> is composed.
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