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https://issues.apache.org/jira/browse/KAFKA-10575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17605945#comment-17605945
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Guozhang Wang commented on KAFKA-10575:
---------------------------------------

I've just created a new KIP: 
https://cwiki.apache.org/confluence/display/KAFKA/KIP-869%3A+Improve+Streams+State+Restoration+Visibility

> StateRestoreListener#onRestoreEnd should always be triggered
> ------------------------------------------------------------
>
>                 Key: KAFKA-10575
>                 URL: https://issues.apache.org/jira/browse/KAFKA-10575
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: highluck
>            Priority: Major
>
> Today we only trigger `StateRestoreListener#onRestoreEnd` when we complete 
> the restoration of an active task and transit it to the running state. 
> However the restoration can also be stopped when the restoring task gets 
> closed (because it gets migrated to another client, for example). We should 
> also trigger the callback indicating its progress when the restoration 
> stopped in any scenarios.



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