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https://issues.apache.org/jira/browse/KAFKA-10100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17125984#comment-17125984
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Ismael Juma commented on KAFKA-10100:
-------------------------------------
I had noticed this too. I was wondering if it's worth doing this given that
KIP-500 will change how we propagate metadata. If there's a concrete
performance benefit, then we should do it, of course.
> LiveLeaders field in LeaderAndIsrRequest is not used anymore
> ------------------------------------------------------------
>
> Key: KAFKA-10100
> URL: https://issues.apache.org/jira/browse/KAFKA-10100
> Project: Kafka
> Issue Type: Improvement
> Reporter: David Jacot
> Assignee: David Jacot
> Priority: Major
>
> We have noticed that the `LiveLeaders` field in the LeaderAndIsrRequest is
> not used anywhere but still populated by the controller.
> It seems that that field was introduced in AK `0.8.0` and was supposed to be
> removed in AK `0.8.1`:
> [https://github.com/apache/kafka/blob/0.8.0/core/src/main/scala/kafka/cluster/Partition.scala#L194.]
> I think that we can safely deprecate the field and stop populating it for all
> versions > 0.
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