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https://issues.apache.org/jira/browse/KAFKA-12751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajini Sivaram resolved KAFKA-12751.
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Reviewer: David Arthur
Resolution: Fixed
> ISRs remain in in-flight state if proposed state is same as actual state
> ------------------------------------------------------------------------
>
> Key: KAFKA-12751
> URL: https://issues.apache.org/jira/browse/KAFKA-12751
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 2.7.0, 2.8.0, 2.7.1
> Reporter: Rajini Sivaram
> Assignee: Rajini Sivaram
> Priority: Critical
> Fix For: 2.7.2, 2.8.1
>
>
> If proposed ISR state in an AlterIsr request is the same as the actual state,
> Controller returns a successful response without performing any updates. But
> the broker code that processes the response leaves the ISR state in in-flight
> state without committing. This prevents further ISR updates until the next
> leader election.
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