[jira] [Created] (KAFKA-6729) KTable should use user source topics if possible and not create changelog topic

["Matthias J. Sax (JIRA)" <ji...@apache.org>]

Matthias J. Sax created KAFKA-6729:
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             Summary: KTable should use user source topics if possible and not create changelog topic
                 Key: KAFKA-6729
                 URL: https://issues.apache.org/jira/browse/KAFKA-6729
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 1.0.0
            Reporter: Matthias J. Sax
             Fix For: 1.2.0


With KIP-182 we reworked Streams API largely and introduced a regression into 1.0 code base. If a KTable is populated from a source topic, ie, StreamsBuilder.table() -- the KTable does create its own changelog topic. However, in older releases (0.11 or older), we don't create a changelog topic but use the user specified source topic instead.

We want to reintroduce this optimization to reduce the load (storage and write) on the broker side for this case.



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