[DISCUSS] KIP-904 Kafka Streams - Guarantee subtractor is called before adder if key has not changed

[Fq Public]

Hi everyone,

I'd like to share a new KIP for discussion:
https://cwiki.apache.org/confluence/x/P5VbDg

This could be considered mostly as a "bug fix" but we wanted to raise a KIP
for discussion because it involves changes to the serialization format of
an internal topic which raises backward compatibility considerations.

Please take a look and let me know what you think.

Thanks,
Farooq