π ~1 min read
Table of contents
Symptom & Impact
Database remains unavailable and dependent applications fail requests.
Environment & Reproduction
Seen after abrupt power loss while write-heavy transactions were active.
Root Cause Analysis
InnoDB recovery cannot complete due to corrupted or inconsistent log state.
Quick Triage
Inspect MySQL error log and confirm data disk has free space.
Step-by-Step Diagnosis
Validate ib_logfile integrity, permissions, and pending crash recovery markers.
Solution – Primary Fix
Perform controlled InnoDB recovery, repair metadata issues, and restart service.
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Solution – Alternative Approaches
Restore from recent backup and replay binlogs if corruption is extensive.
Verification & Acceptance Criteria
Service starts cleanly and consistency checks pass on critical tables.
Rollback Plan
Roll back to standby replica if recovery attempts increase data risk.
Prevention & Hardening
Enable graceful shutdown controls, replication, and verified backup drills.
Related Errors & Cross-Refs
Related with redo log mismatch and table marked crashed messages.
Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.
View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Review MySQL crash recovery and InnoDB operational guidance.
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