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https://issues.apache.org/jira/browse/KAFKA-16836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lucas Brutschy reassigned KAFKA-16836:
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Assignee: Lucas Brutschy (was: Arti Kumari)
> Suspend reason of standby update listener is not correct
> --------------------------------------------------------
>
> Key: KAFKA-16836
> URL: https://issues.apache.org/jira/browse/KAFKA-16836
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 3.8.0
> Reporter: Bruno Cadonna
> Assignee: Lucas Brutschy
> Priority: Major
>
> The standby update listener introduced in KIP-988 takes a suspend reason in
> {{standbyUpdateListener.onUpdateSuspended()}}. The reason is determined in
> {{StoreChangelogReader#unregister()}} based on the state of the standby task
> [1]. However, {{unregister()}} is called in the state updater and in the
> state updater the state of the standby is always {{RUNNING}} since the state
> updater never changes the state of a task. So the standby task will always
> have {{PROMOTED}} as suspend reason, even if the standby is migrated.
> [1]
> https://github.com/apache/kafka/blob/83110e2d425b49fed8ad5fdc6e93579423c73289/streams/src/main/java/org/apache/kafka/streams/processor/internals/StoreChangelogReader.java#L1064
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