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https://issues.apache.org/jira/browse/KAFKA-4427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang resolved KAFKA-4427.
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Resolution: Fixed
Issue resolved by pull request 2171
[https://github.com/apache/kafka/pull/2171]
> Skip topicGroups with no tasks
> ------------------------------
>
> Key: KAFKA-4427
> URL: https://issues.apache.org/jira/browse/KAFKA-4427
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.0
> Reporter: Eno Thereska
> Assignee: Eno Thereska
> Fix For: 0.10.2.0
>
>
> Currently the StreamPartitionAssignor's "assign" method does not handle cases
> where we don't have tasks for a particular topic group. E.g., code like this
> might give an NPE:
> "for (TaskId task : tasksByTopicGroup.get(topicGroupId))"
> We need to handle the above cases.
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