Error
Error Code:
3901
MySQL Error 3901: Corrupt Privilege Definition
Description
This error indicates a critical inconsistency in how privileges are defined for a user on a database. It occurs when a specific privilege is simultaneously marked as partially revoked and explicitly granted within the `mysql.db` system table, suggesting potential corruption within the `mysql` schema which manages all user permissions.
Error Message
%s' privilege for database '%s' exists both as partial revoke and mysql.db simultaneously. It could mean that the 'mysql' schema is corrupted.
Known Causes
4 known causesManual Privilege Table Modification
Directly altering tables within the `mysql` system database (e.g., `mysql.db`, `mysql.user`) instead of using standard `GRANT` and `REVOKE` SQL commands can introduce inconsistencies.
Incomplete or Failed Upgrade
Issues during a MySQL server upgrade process can leave the internal privilege tables in an inconsistent or corrupted state, leading to conflicting privilege definitions.
Corrupted Backup Restoration
Restoring the `mysql` system database from a backup that was already inconsistent or from a different MySQL version can reintroduce or create privilege conflicts.
Software Bug
While rare, an internal bug in MySQL's privilege management system could, under specific circumstances, lead to an inconsistent state in the `mysql` schema.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service