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https://issues.apache.org/jira/browse/KAFKA-3890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang resolved KAFKA-3890.
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Resolution: Fixed
Fix Version/s: 0.10.0.1
Issue resolved by pull request 1543
[https://github.com/apache/kafka/pull/1543]
> Kafka Streams: task assignment is not maintained on cluster restart or
> rolling restart
> --------------------------------------------------------------------------------------
>
> Key: KAFKA-3890
> URL: https://issues.apache.org/jira/browse/KAFKA-3890
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Henry Cai
> Assignee: Henry Cai
> Labels: api, newbie
> Fix For: 0.10.0.1
>
>
> Currently the task assignment in TaskAssignor is not deterministic. During
> cluster restart or rolling restart, even though the participating worker
> nodes are the same, but the TaskAssignor is not able to maintain a
> deterministic mapping, so about 20% partitions will be reassigned which would
> cause state repopulation on cluster restart time.
> When the participating worker nodes are not changed, we really just want to
> keep the old task assignment.
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