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https://issues.apache.org/jira/browse/KAFKA-10277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax updated KAFKA-10277:
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Labels: beginner newbie (was: )
> Relax non-null key requirement for KStream-GlobalKTable joins
> -------------------------------------------------------------
>
> Key: KAFKA-10277
> URL: https://issues.apache.org/jira/browse/KAFKA-10277
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Matthias J. Sax
> Priority: Major
> Labels: beginner, newbie
>
> In general, Kafka Streams requires that key and value are non-null for
> aggregations and join input records. While this requirement is reasonable in
> general, for KStream-GlobalKTable joins it's questionable for the stream
> input record key. The join is based on a `keySelector` and it seems to be
> sufficient to require that the `keySelector` returns a not-null join-key for
> the stream record.
> We should consider to relax the non-null key requirement for stream-side
> input records.
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