KafkaMetricMeterTypeBuilder $$Lambda Leak?

[erkieh]

Expected Behavior

JVM Heap usage not increasing

Actual Behaviour

I have noticed that in environments where we have not disabled kafka metrics, the memory usage creeps up.

Dumps show a large retained memory allocation for
KafkaMetricMeterTypeBuilder$$Lambda
KafkaMetricMeterTypeBuilder
and
KafkaMetricMeterTypeRegistry
instances.

Also a large amount of KafkaMetricMeterType-s

Steps To Reproduce

I am not sure if it is relevant but we do have some Kafka group rebalancing events going on.

Environment Information

Alpine Linux
Kotlin 2.1
Java 21

Example Application

No response

Version

4.7.1