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https://issues.apache.org/jira/browse/KAFKA-14049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17818136#comment-17818136
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Florin Akermann commented on KAFKA-14049:
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[~mjsax]
Yes.
The following behavior has been asserted as part of KIP-962
[https://github.com/apache/kafka/blob/trunk/streams/src/test/java/org/apache/kafka/streams/integration/RelaxedNullKeyRequirementJoinTest.java#L106]
So I'd say we can close this item.
> Relax Non Null Requirement for KStreamGlobalKTable Left Join
> ------------------------------------------------------------
>
> Key: KAFKA-14049
> URL: https://issues.apache.org/jira/browse/KAFKA-14049
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Saumya Gupta
> Assignee: Florin Akermann
> Priority: Major
>
> Null Values in the Stream for a Left Join would indicate a Tombstone Message
> that needs to propagated if not actually joined with the GlobalKTable
> message, hence these messages should not be ignored .
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