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From "Damian Guy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-4724) Clean up of state directories has a race condition and can possibly remove stores that are sill used
Date Thu, 02 Feb 2017 11:35:51 GMT
Damian Guy created KAFKA-4724:
---------------------------------

             Summary: Clean up of state directories has a race condition and can possibly
remove stores that are sill used
                 Key: KAFKA-4724
                 URL: https://issues.apache.org/jira/browse/KAFKA-4724
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 0.10.2.0
            Reporter: Damian Guy
             Fix For: 0.10.3.0


Currently, each {{StreamThread}} cleans up unused state directories based on the config {{StreamsConfig.STATE_CLEANUP_DELAY_MS_CONFIG}}.

In situations where there are multiple threads configured this can lead to a race condition
where the state directory gets removed by one thread when the task has been assigned (but
not yet taken a lock) to another thread in the process.




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