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https://issues.apache.org/jira/browse/KAFKA-5309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026485#comment-16026485
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ASF GitHub Bot commented on KAFKA-5309:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/3140
> Stores not queryable after one thread died
> ------------------------------------------
>
> Key: KAFKA-5309
> URL: https://issues.apache.org/jira/browse/KAFKA-5309
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.1
> Reporter: Matthias J. Sax
> Assignee: Matthias J. Sax
> Fix For: 0.11.0.0
>
>
> For a multi threaded Streams instance, it can happen that one thread dies
> while all other threads (within a single instance) keep running. Even if this
> is an rare scenario, we should allow querying the stores after rebalance
> finished. However, this does never happen, as the died thread's state is
> still in {{KafkaStreams}} thread state map (as {{NOT_RUNNING}}), and thus,
> {{KafkaStreams}} itself is in state {{REBALANCING}} all the time and does not
> transit back to {{RUNNING}}.
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