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https://issues.apache.org/jira/browse/CASSANDRA-13944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16217306#comment-16217306
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Blake Eggleston commented on CASSANDRA-13944:
---------------------------------------------
[~krummas] fixed
> 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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