[CASSANDRA-15204] Toughen up column drop/recreate validations in 3.0/3.11

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.0.19, 3.11.5
• Component/s: Cluster/Schema
• Bug Category: Correctness - Recoverable Corruption / Loss
• Severity: Normal
• Complexity: Normal
• Discovered By: Code Inspection
• Platform: All
• Since Version: 3.0.0

Source Control Link

855fc91596b10a89a504b3491952d06ffe93618d

Test and Documentation Plan

New unit tests

• Assignee: Aleksey Yeschenko
• Reporter: Aleksey Yeschenko

Authors

Aleksey Yeschenko

Reviewers

Sam Tunnicliffe

• Created: 09/Jul/19 16:18
• Updated: 10/Jul/19 14:34
• Resolved: 10/Jul/19 14:34

Description

After CASSANDRA-8099 it’s no longer possible to safely drop/add columns with incompatible types. In 4.0 we validate this correctly, but in 3.0 we don’t,
and that can result in unreadable sstables (corrupted serialization headers causing simple columns to be read as complex or vice versa).

This patch brings 3.0 in line with 4.0 restrictions, making such corruption impossible.