Ken Huang comments

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                                            Ken Huang

KAFKA-17568 Rewrite TestPurgatoryPerformance by JMH

Thanks for your suggestion, I will change it to plain Java

KAFKA-17568 Rewrite TestPurgatoryPerformance by JMH

my local mashine can run the test ![image](https://github.com/user-attachments/assets/1976751f-5f1e-4f2b-9d42-3a73d3d89f89)

KAFKA-19940 Reduce the log4j2 cpu usage in PersisterStateManager

Thanks for @smjn comment, I have updated to use the `getCanonicalName()`, and I did the following step for testing 1. Create a local Kafka cluster. 2. Produce and Consumer some...

KAFKA-19931 Inconsistency in handling the null config value, duplicate value, error code

Thanks for @junrao comment, I have started a discussion thread. FYI: https://lists.apache.org/thread/lqn0xw0zdfwl9m990otjvswzqh5bmy8v

KAFKA-19931 Inconsistency in handling the null config value, duplicate value, error code

> I noticed another inconsistency related to this patch. The controller does not validate the dynamic configurations when handling requests, which results in a misleading success response. By contrast, the...