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Asutosh Pandya commented on KAFKA-7492: --------------------------------------- [~mjsax] > Explain `null` handling for reduce and aggregate > ------------------------------------------------ > > Key: KAFKA-7492 > URL: https://issues.apache.org/jira/browse/KAFKA-7492 > Project: Kafka > Issue Type: Improvement > Components: documentation, streams > Affects Versions: 2.3.0 > Reporter: Matthias J. Sax > Priority: Minor > Labels: beginner, docs, newbie > > We currently don't explain how records with `null` value are handled in > reduce and aggregate. In particular, what happens when the users' > aggregation/reduce `apply()` implementation returns `null`. > We should update the JavaDocs accordingly and maybe also update the docs on > the web page. > Cf. > https://stackoverflow.com/questions/52692202/what-happens-if-the-aggregator-of-a-kgroupedstream-returns-null -- This message was sent by Atlassian JIRA (v7.6.3#76005)