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https://issues.apache.org/jira/browse/KAFKA-6383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohan Desai reopened KAFKA-6383:
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I missed a race condition in my fix. If we start and then shutdown a streams
thread without the streams thread running in between, then shutdown() throws an
IllegalThreadStateException. This happens because shutdown() uses
StreamThread.state to decide whether to call start(), and the state is
transitioned from run which may not have executed yet.
> StreamThread.shutdown doesn't clean up completely when called before
> StreamThread.start
> ---------------------------------------------------------------------------------------
>
> Key: KAFKA-6383
> URL: https://issues.apache.org/jira/browse/KAFKA-6383
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 1.0.0
> Reporter: Rohan Desai
> Assignee: Rohan Desai
> Fix For: 1.1.0
>
>
> The following code leaks a producer network thread:
> {code}
> ks = new KafkaStreams(...);
> ks.close();
> {code}
> The underlying issue is that KafkaStreams creates a bunch of StreamsThreads
> via StreamThread.create, which in turn creates a bunch of stuff (including a
> producer). These resources are cleaned up only when the thread exits. So if
> the thread was never started, then they are never cleaned up.
> StreamThread.shutdown should clean up if it sees that the thread has never
> been started.
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