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https://issues.apache.org/jira/browse/KAFKA-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neha Narkhede closed KAFKA-1653.
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> Duplicate broker ids allowed in replica assignment
> --------------------------------------------------
>
> Key: KAFKA-1653
> URL: https://issues.apache.org/jira/browse/KAFKA-1653
> Project: Kafka
> Issue Type: Bug
> Components: tools
> Affects Versions: 0.8.1.1
> Reporter: Ryan Berdeen
> Assignee: Ewen Cheslack-Postava
> Labels: newbie
> Fix For: 0.8.2
>
> Attachments: KAFKA-1653.patch, KAFKA-1653_2014-10-16_14:54:07.patch,
> KAFKA-1653_2014-10-21_11:57:50.patch
>
>
> The reassign partitions command and the controller do not ensure that all
> replicas for a partition are on different brokers. For example, you could set
> 1,2,2 as the list of brokers for the replicas.
> kafka-topics.sh --describe --under-replicated will list these partitions as
> under-replicated, but I can't see a reason why the controller should allow
> this state.
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