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Robin Moffatt commented on KAFKA-7497: -------------------------------------- Here's the use case, inspecting a stream of transactions looking for possible fraud: https://github.com/confluentinc/demo-scene/blob/master/ksql-atm-fraud-detection/ksql-atm-fraud-detection.adoc > Kafka Streams should support self-join on streams > ------------------------------------------------- > > Key: KAFKA-7497 > URL: https://issues.apache.org/jira/browse/KAFKA-7497 > Project: Kafka > Issue Type: New Feature > Components: streams > Reporter: Robin Moffatt > Priority: Major > Labels: needs-kip > > There are valid reasons to want to join a stream to itself, but Kafka Streams > does not currently support this ({{Invalid topology: Topic foo has already > been registered by another source.}}). To perform the join requires creating > a second stream as a clone of the first, and then doing a join between the > two. This is a clunky workaround and results in unnecessary duplication of > data. -- This message was sent by Atlassian JIRA (v7.6.3#76005)