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https://issues.apache.org/jira/browse/KAFKA-12958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17369439#comment-17369439
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HaiyuanZhao commented on KAFKA-12958:
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Hi, [~jagsancio]
I would like to take this if this issue is still open
> Add simulation invariant for leadership and snapshot
> ----------------------------------------------------
>
> Key: KAFKA-12958
> URL: https://issues.apache.org/jira/browse/KAFKA-12958
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Jose Armando Garcia Sancio
> Priority: Major
>
> During the simulation we should add an invariant that notified leaders are
> never asked to load snapshots. The state machine always sees the following
> sequence of callback calls:
> Leaders see:
> ...
> handleLeaderChange state machine is notify of leadership
> handleSnapshot is never called
> Non-leader see:
> ...
> handleLeaderChange state machine is notify that is not leader
> handleSnapshot is called 0 or more times
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