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https://issues.apache.org/jira/browse/KAFKA-16477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-16477.
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Fix Version/s: 3.8.0
Resolution: Fixed
> Detect thread leaked client-metrics-reaper in tests
> ---------------------------------------------------
>
> Key: KAFKA-16477
> URL: https://issues.apache.org/jira/browse/KAFKA-16477
> Project: Kafka
> Issue Type: Improvement
> Reporter: Kuan Po Tseng
> Assignee: Kuan Po Tseng
> Priority: Major
> Fix For: 3.8.0
>
>
> After profiling the kafka tests, tons of `client-metrics-reaper` thread not
> cleanup after BrokerServer shutdown.
> The thread {{client-metrics-reaper}} comes from
> [ClientMetricsManager#expirationTimer|https://github.com/apache/kafka/blob/a2ee0855ee5e73f3a74555d52294bb4acfd28945/server/src/main/java/org/apache/kafka/server/ClientMetricsManager.java#L115],
> and BrokerServer#shudown doesn't close ClientMetricsManager which let the
> timer thread still runs in background.
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