Hello Sharad.
Can you provide more details here please? I.e. the cluster setup, number of
producers, consumers, topics, partitions, etc.
Regards,
________________________________
From: Sharad Garg (Jira) <j...@apache.org>
Sent: Friday, August 29, 2025 10:01
To: dev@kafka.apache.org <dev@kafka.apache.org>
Subject: [jira] [Created] (KAFKA-19652) Consumer throughput drops by 10 times
with Kafka v3.9.0 in ZK mode
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Sharad Garg created KAFKA-19652:
-----------------------------------
Summary: Consumer throughput drops by 10 times with Kafka v3.9.0
in ZK mode
Key: KAFKA-19652
URL:
https://gbr01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fissues.apache.org%2Fjira%2Fbrowse%2FKAFKA-19652&data=05%7C02%7Cmartin.andersson%40kambi.com%7Cd7c5428500c841ce4dd708dde6d255bc%7Ce3ec1ec4b9944e9e82e080234621871f%7C0%7C0%7C638920513251227598%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=2Dy0GKo%2B0umMQ%2BhiMOvmW9eBtNp3kfTt7jjY%2BMotN7M%3D&reserved=0<https://issues.apache.org/jira/browse/KAFKA-19652>
Project: Kafka
Issue Type: Bug
Components: consumer
Affects Versions: 3.9.0
Reporter: Sharad Garg
Kafka consumer throughput in best-case drops by ~10 times after upgrading to
kafka v3.9.0 from v3.5.1. Note that this is in ZK mode and KRAFT migration is
not done yet.
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