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Posted to jira@kafka.apache.org by GitBox <gi...@apache.org> on 2020/05/04 20:33:27 UTC

[GitHub] [kafka] ableegoldman commented on pull request #8540: KAFKA-9127: don't create StreamThreads for global-only topology

ableegoldman commented on pull request #8540:
URL: https://github.com/apache/kafka/pull/8540#issuecomment-623690181


   @vvcephei yeah the regression was only introduced in 2.5, so we only _need_ to backport it that far. But I actually would agree that we should backport it to 2.4 as well: in a global-only topology you have unnecessary group coordination overhead of any stream threads resulting in unnecessary rebalances, network usage, etc. Of course you can set the number of threads to zero to get around this, but the KafkaStreams state would not reach RUNNING. That's one of the fixes in this PR, which actually is worth backporting 


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