[jira] [Commented] (CASSANDRA-7530) Repair should be allowed in mixed version clusters

["Michael Semb Wever (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17630993#comment-17630993 ] 

Michael Semb Wever commented on CASSANDRA-7530:
-----------------------------------------------

Note, the new Messaging System (4.0) [does not|https://issues.apache.org/jira/browse/CASSANDRA-15066?focusedCommentId=16801284&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16801284] support mix-version (by [MS versions|https://github.com/apache/cassandra/blob/cassandra-4.0/src/java/org/apache/cassandra/net/MessagingService.java#L201]) streaming [anymore|https://github.com/apache/cassandra/blob/cassandra-4.0/src/java/org/apache/cassandra/net/InboundConnectionInitiator.java#L298-L305].

> Repair should be allowed in mixed version clusters
> --------------------------------------------------
>
>                 Key: CASSANDRA-7530
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7530
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Consistency/Repair
>            Reporter: Jeremiah Jordan
>            Priority: Normal
>              Labels: ponies
>
> As we try to improve the ops experience for large clusters (or cautious people), we need to make it so repair works across major version upgrades.
> Currently you have to be able to upgrade all of your nodes and then run a full repair, within the gc_grace window.
> The recent ability to stream old sstables makes this a little better, as you don't have to also run upgradesstables first.
> It would be really good if we could let people pause their upgrade of 1000 nodes to run some repairs.  Or to upgrade one DC and test the new major version for a while (while still running repairs).



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