[jira] [Commented] (CASSANDRA-14937) Multi-version In-JVM dtests

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

    [ https://issues.apache.org/jira/browse/CASSANDRA-14937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16724340#comment-16724340 ] 

Benedict commented on CASSANDRA-14937:
--------------------------------------

A first version of this is up for [3.0|https://github.com/belliottsmith/cassandra/tree/14937-3.0].

Obviously this needs to be back- and forward-ported, but I have hacked the distributed tests in this branch to run against an external jar of the same version, and all functionality goes through the cross-version API.  Porting it to the other versions should be fairly straightforward, though it will no doubt end up conflicting with the changes on CASSANDRA-14922.

> Multi-version In-JVM dtests
> ---------------------------
>
>                 Key: CASSANDRA-14937
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14937
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Testing
>            Reporter: Benedict
>            Assignee: Benedict
>            Priority: Major
>             Fix For: 2.2.x, 3.0.x, 3.11.x
>
>
> In order to support more sophisticated upgrade tests, including complex fuzz tests that can span a sequence of version upgrades, we propose abstracting a cross-version API for the in-jvm dtests.  This will permit starting a node with an arbitrary compatible C* version, stopping the node, and restarting it with another C* version.



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