[CASSANDRA-14513] Reverse order queries in presence of range tombstones may cause permanent data loss

• Type: Bug
• Status: Resolved
• Priority: Urgent
• Resolution: Fixed
• Fix Version/s: 3.0.17, 3.11.3, 4.0-alpha1, 4.0
• Component/s: Legacy/Core, Legacy/CQL, Legacy/Local Write-Read Paths
• Bug Category: Correctness - Unrecoverable Corruption / Loss
• Severity: Critical
• Assignee: Sam Tunnicliffe
• Reporter: Sam Tunnicliffe

Authors

Sam Tunnicliffe

Reviewers

Aleksey Yeschenko

• Created: 12/Jun/18 15:01
• Updated: 15/May/20 08:02
• Resolved: 14/Jun/18 17:23

Description

Slice queries in descending sort order can create oversized artificial range tombstones. At CL > ONE, read repair can propagate these tombstones to all replicas, wiping out vast data ranges that they mistakenly cover.