[jira] [Assigned] (KAFKA-14608) Make sure reassignment does not cause under min ISR

["Andrew Grant (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-14608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Grant reassigned KAFKA-14608:
------------------------------------

    Assignee: Andrew Grant

> Make sure reassignment does not cause under min ISR
> ---------------------------------------------------
>
>                 Key: KAFKA-14608
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14608
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Andrew Grant
>            Assignee: Andrew Grant
>            Priority: Major
>
> In KRaft mode we complete reassignments only when the adding replicas have been added to the ISR - see [https://github.com/apache/kafka/blob/trunk/metadata/src/main/java/org/apache/kafka/controller/PartitionChangeBuilder.java#L288.] As a result its possible for the partition to go under min ISR if the number of adding replicas is less than the topic's under min ISR config.
> This behavior differs to ZK mode where we require all target replicas to be in the ISR for the reassignment to complete - see https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/controller/KafkaController.scala#L1003.



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