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Mar 1, 2026 · Databases

Critical MySQL 8.0 Undo Log Truncate Bug: Risks, Bug Chain, and Immediate Mitigation

If your MySQL 8.0 replica runs with super_read_only and the default innodb_undo_log_truncate=ON, a hidden undo‑log truncation bug can corrupt data, trigger a cascade of related bugs, and remain unresolved in 8.0 releases, demanding urgent checks and workarounds.