[CASSANDRA-14824] Expand range tombstone validation checks to multiple interim request stages

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.0.18, 3.11.4, 4.0-alpha1, 4.0
• Component/s: Local/SSTable
• Bug Category: Correctness - Transient Incorrect Response
• Severity: Normal
• Complexity: Normal
• Assignee: Aleksey Yeschenko
• Reporter: Aleksey Yeschenko

Authors

Aleksey Yeschenko

Reviewers

Blake Eggleston, Sam Tunnicliffe

• Created: 15/Oct/18 17:21
• Updated: 15/May/20 08:03
• Resolved: 16/Oct/18 16:29

Description

RTBoundValidator was originally only added to verify the end-game response iterator produced by ReadCommand.

However, turns out it's possible for sequencing errors in lower-level iterators to be silently erased by upstream iterators - as a result of merging two invalid iterators into one valid iterator, for example. CASSANDRA-14823 can create such a scenario.

The upcoming patch would attach the checker at the intermediate stages, ensuring that we can detect those otherwise silent corruptions.