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https://issues.apache.org/jira/browse/KAFKA-6164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16236900#comment-16236900
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Ted Yu commented on KAFKA-6164:
-------------------------------
ThrottledRequestReaper extends ShutdownableThread where
{code}
abstract class ShutdownableThread(val name: String, val isInterruptible:
Boolean = true)
extends Thread(name) with Logging {
this.setDaemon(false)
{code}
should a subclass of ShutdownableThread with daemon being true be created ?
> ClientQuotaManager threads prevent shutdown when encountering an error
> loading logs
> -----------------------------------------------------------------------------------
>
> Key: KAFKA-6164
> URL: https://issues.apache.org/jira/browse/KAFKA-6164
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.11.0.0, 1.0.0
> Reporter: Xavier Léauté
> Priority: Major
>
> While diagnosing KAFKA-6163, we noticed that when the broker initiates a
> shutdown sequence in response to an error loading the logs, the process never
> exits. The JVM appears to be waiting indefinitely for several non-deamon
> threads to terminate.
> The threads in question are {{ThrottledRequestReaper-Request}},
> {{ThrottledRequestReaper-Produce}}, and {{ThrottledRequestReaper-Fetch}}, so
> it appears we don't properly shutdown {{ClientQuotaManager}} in this
> situation.
> QuotaManager shutdown is currently handled by KafkaApis, however KafkaApis
> will never be instantiated in the first place if we encounter an error
> loading the logs, so quotamangers are left dangling in that case.
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