[CASSANDRA-17897] Compaction NullPointerException when changing neverPurgeTombstones from true to false

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 5.0-alpha1, 5.0
• Component/s: Local/Compaction
• Bug Category: Degradation - Other Exception
• Severity: Low
• Complexity: Normal
• Discovered By: User Report
• Platform: All
• Since Version: 4.0

Source Control Link

https://gitbox.apache.org/repos/asf?p=cassandra.git;a=commit;h=ff5f4833aa3e11fcffd6bff1b15597fd5a38b864

Test and Documentation Plan

New unit test to confirm NPE's don't fire

• Assignee: Josh McKenzie Assign to me
• Reporter: Josh McKenzie

Authors

Josh McKenzie

Reviewers

Marcus Eriksson

• Created: 14/Sep/22 19:01
• Updated: 12/Sep/23 13:02
• Resolved: 19/Sep/22 16:09

Description

When changing neverPurgeTombstones from true to false we have a few fields in CompactionController nulled out; this means that ongoing compactions might get exceptions.

This is a pretty infrequent edge case so ok putting this trunk only and back-porting if someone runs into it on other versions.