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Posted to jira@kafka.apache.org by "Matthias J. Sax (JIRA)" <ji...@apache.org> on 2017/07/06 23:17:00 UTC

[jira] [Commented] (KAFKA-5562) Do streams state directory cleanup on a single thread

    [ https://issues.apache.org/jira/browse/KAFKA-5562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16077341#comment-16077341 ] 

Matthias J. Sax commented on KAFKA-5562:
----------------------------------------

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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