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https://issues.apache.org/jira/browse/KAFKA-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Damian Guy resolved KAFKA-5440.
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    Resolution: Duplicate

> Kafka Streams report state RUNNING even if all threads are dead
> ---------------------------------------------------------------
>
>                 Key: KAFKA-5440
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5440
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 0.10.2.1, 0.11.0.0
>            Reporter: Matthias J. Sax
>             Fix For: 0.11.0.1, 1.0.0
>
>
> From the mailing list:
> {quote}
> Hi All,
> We recently implemented a health check for a Kafka Streams based application. 
> The health check is simply checking the state of Kafka Streams by calling 
> KafkaStreams.state(). It reports healthy if it’s not in PENDING_SHUTDOWN or 
> NOT_RUNNING states. 
> We truly appreciate having the possibility to easily check the state of Kafka 
> Streams but to our surprise we noticed that KafkaStreams.state() returns 
> RUNNING even though all StreamThreads has crashed and reached NOT_RUNNING 
> state. Is this intended behaviour or is it a bug? Semantically it seems weird 
> to me that KafkaStreams would say it’s RUNNING when it is in fact not 
> consuming anything since all underlying working threads has crashed. 
> If this is intended behaviour I would appreciate an explanation of why that 
> is the case. Also in that case, how could I determine if the consumption from 
> Kafka hasn’t crashed? 
> If this is not intended behaviour, how fast could I expect it to be fixed? I 
> wouldn’t mind fixing it myself but I’m not sure if this is considered trivial 
> or big enough to require a JIRA. Also, if I would implement a fix I’d like 
> your input on what would be a reasonable solution. By just inspecting to code 
> I have an idea but I’m not sure I understand all the implication so I’d be 
> happy to hear your thoughts first. 
> {quote}



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