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https://issues.apache.org/jira/browse/KAFKA-7380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16731745#comment-16731745
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ASF GitHub Bot commented on KAFKA-7380:
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ConcurrencyPractitioner commented on pull request #5879: [KAFKA-7380] Global
thread restore blocks KafkaStreams#start()
URL: https://github.com/apache/kafka/pull/5879
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> Global thread restore blocks KafkaStreams#start()
> -------------------------------------------------
>
> Key: KAFKA-7380
> URL: https://issues.apache.org/jira/browse/KAFKA-7380
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Matthias J. Sax
> Assignee: Richard Yu
> Priority: Minor
>
> KafkaStreams#start() is documented to be non-blocking and should return
> immediately. However, if global stores are used, `start()` blocks until all
> global stores are restored.
> We should change this and start all threads at the same time while all
> StreamThread would to go `wait()` state on startup immediately, and only
> resume after global thread restore finishes and `wakeup()` all StreamThreads.
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