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https://issues.apache.org/jira/browse/KAFKA-5562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16077341#comment-16077341
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Matthias J. Sax commented on KAFKA-5562:
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Seems to be related to https://issues.apache.org/jira/browse/KAFKA-4890
> Do streams state directory cleanup on a single thread
> -----------------------------------------------------
>
> Key: KAFKA-5562
> URL: https://issues.apache.org/jira/browse/KAFKA-5562
> Project: Kafka
> Issue Type: Bug
> Reporter: Damian Guy
> Assignee: Damian Guy
>
> Currently in streams we clean up old state directories every so often (as
> defined by {{state.cleanup.delay.ms}}). However, every StreamThread runs the
> cleanup, which is both unnecessary and can potentially lead to race
> conditions.
> It would be better to perform the state cleanup on a single thread and only
> when the {{KafkaStreams}} instance is in a running state.
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