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https://issues.apache.org/jira/browse/KAFKA-832?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neha Narkhede closed KAFKA-832.
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> 0.8 Consumer prevents rebalance if consumer thread is blocked or slow
> ---------------------------------------------------------------------
>
> Key: KAFKA-832
> URL: https://issues.apache.org/jira/browse/KAFKA-832
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Affects Versions: 0.8
> Reporter: Neha Narkhede
> Assignee: Jun Rao
> Priority: Blocker
> Labels: kafka-0.8, p2
> Fix For: 0.8
>
> Attachments: kafka-832.patch
>
>
> 0.8 consumer involves multiple locks across the fetcher manager, leader
> finder thread and the rebalance watcher executor that prevent rebalance from
> interrupting the consumer. Rebalance should always take precedence over
> consumption, not the other way around. The effect of this bug is that if a
> consumer is lagging and the fetcher thread is blocked on adding the next
> fetched data chunk to the internal blocking queue, rebalance is halted.
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