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https://issues.apache.org/jira/browse/CASSANDRA-12716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15544762#comment-15544762
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Stefania commented on CASSANDRA-12716:
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It's because of a bug in the driver, which is fixed by this
[commit|https://github.com/datastax/python-driver/commit/8289de0b3858917e47e479dbc98dd9b4073f577e].
We are working on upgrading the cqlsh bundled driver in CASSANDRA-12736.
> Remove pre-3.0 compatibility code for 4.0
> -----------------------------------------
>
> Key: CASSANDRA-12716
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12716
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Fix For: 4.0
>
>
> CASSANDRA-8099 make subsequent changes to internal formats so that we have
> quite a bit of backward compatibility code a bit over the place. Due to that,
> but also as a natural evolution, I believe we always had a tacit agreement
> that 3.0/3.X would be a mandatory step on the upgrade to 4.X, so that we can
> remove pre-3.0 compatibility (that is, we won't support going from any 2.x
> release directly to 4.0, you'll have to upgrade to at least some 3.0 release
> first).
> I think it's time to create the 4.0 branch and remove that pre-3.0 backward
> compatibility code, which should clean code quite a bit, and that's the goal
> of this issue.
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