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https://issues.apache.org/jira/browse/KAFKA-16218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Drawxy updated KAFKA-16218:
---------------------------
Affects Version/s: 3.1.2
> Partition reassignment can't complete if any target replica is out-of-sync
> --------------------------------------------------------------------------
>
> Key: KAFKA-16218
> URL: https://issues.apache.org/jira/browse/KAFKA-16218
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 3.1.2
> Reporter: Drawxy
> Priority: Major
>
> Assumed that there were 4 brokers (1001,2001,3001,4001) and a topic partition
> _foo-0_ (replicas[1001,2001,3001], isr[1001,3001]). The replica 2001 can't
> catch up and become out-of-sync due to some issue.
> If we launch a partition reassinment for this _foo-0_ (the target replica
> list is [1001,2001,4001]), the partition reassignment can't complete even if
> the adding replica 4001 already catches up. At that time, the partition state
> would be replicas[1001,2001,4001,3001] isr[1001,3001,4001].
>
> The out-of-sync replica 2001 shouldn't make the partition reassignment stuck.
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