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https://issues.apache.org/jira/browse/KAFKA-14433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17642123#comment-17642123
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David Arthur commented on KAFKA-14433:
--------------------------------------
I did some investigation on this. Running {{./gradlew -PmaxParallelForks=1
:core:integrationTest}} to better capture the leaked objects, I took a heap
dump after 30 minutes. Several KafkaRaftManager instances were hanging around.
!image-2022-12-01-13-53-57-886.png!
This anonymous function "Partition$$anonfun$4" is one of the metric's gauge
closures.
!image-2022-12-01-13-55-35-488.png!
> Clear all yammer metrics when test harnesses clean up
> -----------------------------------------------------
>
> Key: KAFKA-14433
> URL: https://issues.apache.org/jira/browse/KAFKA-14433
> Project: Kafka
> Issue Type: Improvement
> Reporter: Colin McCabe
> Priority: Major
> Attachments: image-2022-12-01-13-53-57-886.png,
> image-2022-12-01-13-55-35-488.png
>
>
> We should clear all yammer metrics from the yammer singleton when the
> integration test harnesses clean up. This would avoid memory leaks in tests
> that have a lot of test cases.
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