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https://issues.apache.org/jira/browse/KAFKA-948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13690020#comment-13690020
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Jun Rao commented on KAFKA-948:
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Dibyendu,
Actually, the controller doesn't need to cache the latest ISR information. The
only time when the controller needs ISR is to elect a new leader. The
controller will read the latest ISR from ZK and do a conditional update.
Coud you provide more details on the issue that you are seeing?
> ISR list in LeaderAndISR path not updated for partitions when Broker (which
> is not leader) is down
> --------------------------------------------------------------------------------------------------
>
> Key: KAFKA-948
> URL: https://issues.apache.org/jira/browse/KAFKA-948
> Project: Kafka
> Issue Type: Bug
> Components: controller
> Affects Versions: 0.8
> Reporter: Dibyendu Bhattacharya
> Assignee: Neha Narkhede
>
> When the broker which is the leader for a partition is down, the ISR list in
> the LeaderAndISR path is updated. But if the broker , which is not a leader
> of the partition is down, the ISR list is not getting updated. This is an
> issues because ISR list contains the stale entry.
> This issue I found in kafka-0.8.0-beta1-candidate1
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