[jira] [Updated] (CASSANDRA-13944) Throw descriptive errors for mixed mode repair attempts

["Blake Eggleston (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-13944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Blake Eggleston updated CASSANDRA-13944:
----------------------------------------
    Reviewer: Marcus Eriksson
      Status: Patch Available  (was: Open)

[trunk|https://github.com/bdeggleston/cassandra/tree/13944]
[utests|https://circleci.com/gh/bdeggleston/cassandra/135]

> Throw descriptive errors for mixed mode repair attempts
> -------------------------------------------------------
>
>                 Key: CASSANDRA-13944
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13944
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Repair
>            Reporter: Blake Eggleston
>            Assignee: Blake Eggleston
>            Priority: Minor
>             Fix For: 4.0
>
>
> We often make breaking changes to streaming and repair between major versions, and don't usually support either in mixed mode clusters. Streaming connections check protocol versions, but repair message handling doesn't, which means cryptic exceptions show up in the logs when operators forget to turn off whatever's scheduling repairs on their cluster. Refusing to send or receive repair messages to/ from incompatible messaging service versions, and throwing a descriptive exception would make it clearer why repair is not working, as well as prevent any potentially unexpected behavior.



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