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https://issues.apache.org/jira/browse/KAFKA-4175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15504087#comment-15504087
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ASF GitHub Bot commented on KAFKA-4175:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/1862
> Can't have StandbyTasks in KafkaStreams where NUM_STREAM_THREADS_CONFIG > 1
> ---------------------------------------------------------------------------
>
> Key: KAFKA-4175
> URL: https://issues.apache.org/jira/browse/KAFKA-4175
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.1.0
> Reporter: Damian Guy
> Assignee: Damian Guy
> Fix For: 0.10.1.0
>
>
> When we have StandbyTasks in a Kafka Streams app and we have > 1 threads per
> instance we can run into:
> {code}
> Caused by: java.io.IOException: task [1_0] Failed to lock the state
> directory: /private/tmp/kafka-streams-smoketest/2/SmokeTest/1_0
> {code}
> This is because the same StandbyTask has been assigned to each thread in the
> same KafkaStreams instance
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