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Posted to jira@kafka.apache.org by "Bill Bejeck (Jira)" <ji...@apache.org> on 2020/03/20 15:46:00 UTC
[jira] [Assigned] (KAFKA-9739) StreamsBuilder.build fails with
StreamsException "Found a null keyChangingChild node for
OptimizableRepartitionNode"
[ https://issues.apache.org/jira/browse/KAFKA-9739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Bill Bejeck reassigned KAFKA-9739:
----------------------------------
Assignee: Bill Bejeck
> StreamsBuilder.build fails with StreamsException "Found a null keyChangingChild node for OptimizableRepartitionNode"
> --------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-9739
> URL: https://issues.apache.org/jira/browse/KAFKA-9739
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.4.1
> Reporter: Artur
> Assignee: Bill Bejeck
> Priority: Major
> Attachments: streams-exception-log.txt, topology-description.txt
>
>
> We created a topology using Streams DSL (topology description is available in the attached topology-description.txt, no optimization).
> Topology works fine with {{topology.optimization=none}}, however it fails to build with StreamsException "Found a null keyChangingChild node for OptimizableRepartitionNode" if we set {{topology.optimization=all}} (exception stack trace is attached streams-exception-log.txt).
> We used [https://zz85.github.io/kafka-streams-viz/] to visualize topology and try to guess what might be upsetting optimizer, yet did not manage to figure it out ourselves.
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