[jira] [Commented] (KAFKA-14840) Handle KRaft snapshots in dual-write mode

["Mickael Maison (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-14840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713142#comment-17713142 ] 

Mickael Maison commented on KAFKA-14840:
----------------------------------------

[~mumrah] Is this a blocker for 3.5.0 or should we move this to the next release?

> Handle KRaft snapshots in dual-write mode
> -----------------------------------------
>
>                 Key: KAFKA-14840
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14840
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: kraft
>    Affects Versions: 3.4.0
>            Reporter: David Arthur
>            Assignee: David Arthur
>            Priority: Blocker
>             Fix For: 3.5.0, 3.4.1
>
>
> While the KRaft controller is making writes back to ZK during the migration, we need to handle the case when a snapshot is loaded. This can happen for a number of reasons in KRaft.
> The difficulty here is we will need to compare the loaded snapshot with the entire state in ZK. Most likely, this will be a very expensive operation.
> Without this, dual-write mode cannot safely tolerate a snapshot being loaded, so marking this as a 3.5 blocker.



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