hi Mark
I've added the root cause to the jira ticket. We can continue the
discussion there
Best,
Chia-Ping
Marcus Paget <marcuspaget@gmail.com> 於 2026年2月28日週六 上午2:02寫道：
> Hello Kafka Users and Developers,
>
> For KAFKA-19652 - Consumer throughput drops by 10 times with Kafka v3.9.0
> in ZK mode
>
> I wanted to understand if this is a known issue or an isolated edge case.
> It was reported back in August 2025 and subsequently confirmed by 2 other
> people, able to reproduce the throughput drop. Although nothing
> specifically identifying as a blocker for upgrades to this version or
> later.
>
> Having min.insync.replicas=2 I guess is fairly common, so this would
> affect many installations.
>
> Thanks,
> Mark
>
I've added the root cause to the jira ticket. We can continue the
discussion there
Best,
Chia-Ping
Marcus Paget <marcuspaget@gmail.com> 於 2026年2月28日週六 上午2:02寫道：
> Hello Kafka Users and Developers,
>
> For KAFKA-19652 - Consumer throughput drops by 10 times with Kafka v3.9.0
> in ZK mode
>
> I wanted to understand if this is a known issue or an isolated edge case.
> It was reported back in August 2025 and subsequently confirmed by 2 other
> people, able to reproduce the throughput drop. Although nothing
> specifically identifying as a blocker for upgrades to this version or
> later.
>
> Having min.insync.replicas=2 I guess is fairly common, so this would
> affect many installations.
>
> Thanks,
> Mark
>
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