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https://issues.apache.org/jira/browse/KAFKA-8970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nishkam Ravi resolved KAFKA-8970.
---------------------------------
    Resolution: Fixed

> StateDirectory creation fails with Exception
> --------------------------------------------
>
>                 Key: KAFKA-8970
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8970
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Nishkam Ravi
>            Priority: Major
>
> When two threads try to create KafkaStreams simultaneously, one of them 
> succeeds while the other fails with the following exception:
> org.apache.kafka.streams.errors.StreamsException: 
> org.apache.kafka.streams.errors.ProcessorStateException: base state directory 
> [/tmp/kafka-streams] doesn't exist and couldn't be created
> Quick investigation suggests that this is because the code at/around:
> [https://github.com/apache/kafka/blob/trunk/streams/src/main/java/org/apache/kafka/streams/processor/internals/StateDirectory.java#L82]
> is not synchronized and can lead to race conditions.
> Specifying different values for state.dir can be a workaround for this issue 
> but a bit cumbersome. Can we just make this synchronized?



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