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https://issues.apache.org/jira/browse/KAFKA-8495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sophie Blee-Goldman resolved KAFKA-8495.
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Resolution: Won't Do
Round-robin/range assignors will deliberately not support cooperative
rebalancing, so no need to make them sticky
> Make Round-robin / RangeAssignor to be "sticky" (part 5)
> --------------------------------------------------------
>
> Key: KAFKA-8495
> URL: https://issues.apache.org/jira/browse/KAFKA-8495
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Guozhang Wang
> Priority: Major
>
> For this new algorithm to be effective in reducing rebalance costs, it is
> really expecting the plug-in assignor to be "sticky" in some way, such that
> the diff of the newly-assigned-partitions and the
> existing-assigned-partitions can be small, and hence only a few subset of the
> total number of partitions need to be revoked / migrated at each rebalance in
> practice – otherwise, we are just paying more rebalance for little benefits.
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