[CASSANDRA-12716] Remove pre-3.0 compatibility code for 4.0

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.0-alpha1, 4.0
• Assignee: Sylvain Lebresne
• Reporter: Sylvain Lebresne

Authors

Sylvain Lebresne

Reviewers

Aleksey Yeschenko

• Created: 27/Sep/16 10:10
• Updated: 28/Dec/23 15:42
• Resolved: 30/Nov/16 09:52

Description

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.

Issue Links

• is related to: CASSANDRA-19243 Remove pre-4.0 compatibility code for 5.0
• relates to: CASSANDRA-15444 When using StandaloneUpgrader, loading SSTables into memory should fail if unsupported version is found