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[KIP-962](https://cwiki.apache.org/confluence/display/KAFKA/KIP-962%3A+Relax+non-null+key+requirement+in+Kafka+Streams) The key requirments got relaxed for the followinger streams dsl operator: left join Kstream-Kstream: no longer drop left records with null-key and call ValueJoiner with 'null' for right value. outer join Kstream-Kstream: no longer drop left/right records with null-key and call ValueJoiner with 'null' for right/left value. left-foreign-key join Ktable-Ktable: no longer drop left records with null-foreign-key returned by the ForeignKeyExtractor and call ValueJoiner with 'null' for right value. left join KStream-Ktable: no longer drop left records with null-key and call ValueJoiner with 'null' for right value. left join KStream-GlobalTable: no longer drop records when KeyValueMapper returns 'null' and call ValueJoiner with 'null' for right value. Reviewers: Walker Carlson <wcarlson@apache.org> |
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