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https://issues.apache.org/jira/browse/KAFKA-947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13688719#comment-13688719
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Joel Koshy commented on KAFKA-947:
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+1 thanks for the patch!
> isr-expiration-thread may block LeaderAndIsr request for a relatively long
> period
> ----------------------------------------------------------------------------------
>
> Key: KAFKA-947
> URL: https://issues.apache.org/jira/browse/KAFKA-947
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.8.1
> Reporter: Jun Rao
> Assignee: Jun Rao
> Attachments: kafka-947.patch
>
>
> If there are lots of partitions whose isr needs to be shrank,
> isr-expiration-thread will hold a long lock on leaderPartitionsLock, which
> will delay LeaderAndIsr requests.
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