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https://issues.apache.org/jira/browse/KAFKA-8179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16951472#comment-16951472
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ASF GitHub Bot commented on KAFKA-8179:
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ableegoldman commented on pull request #7516: KAFKA-8179: document upgrade path
for KIP-429
URL: https://github.com/apache/kafka/pull/7516
Document the upgrade path for the consumer and for Streams (note that they
differ significantly).
Needs to be cherry-picked to 2.4
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> Incremental Rebalance Protocol for Kafka Consumer
> -------------------------------------------------
>
> Key: KAFKA-8179
> URL: https://issues.apache.org/jira/browse/KAFKA-8179
> Project: Kafka
> Issue Type: Improvement
> Components: consumer
> Reporter: Guozhang Wang
> Assignee: Guozhang Wang
> Priority: Major
>
> Recently Kafka community is promoting cooperative rebalancing to mitigate the
> pain points in the stop-the-world rebalancing protocol. This ticket is
> created to initiate that idea at the Kafka consumer client, which will be
> beneficial for heavy-stateful consumers such as Kafka Streams applications.
> In short, the scope of this ticket includes reducing unnecessary rebalance
> latency due to heavy partition migration: i.e. partitions being revoked and
> re-assigned. This would make the built-in consumer assignors (range,
> round-robin etc) to be aware of previously assigned partitions and be sticky
> in best-effort.
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