Error
Error Code:
3958
MySQL Error 3958: SDI Metadata Missing
Description
This error indicates that MySQL failed to perform an internal operation on a table's Serialized Dictionary Information (SDI) because a required metadata record could not be found. It typically points to an internal inconsistency or corruption within the InnoDB data dictionary, often affecting a specific table.
Error Message
Failed to %s sdi for %s.%s in %s due to missing record.
Known Causes
4 known causesCorrupted Data Files
The underlying InnoDB data files (.ibd) for the table might be corrupted, leading to missing or unreadable SDI records.
Incomplete Recovery or Backup
Restoring from an incomplete backup or a failed recovery process can leave the data dictionary in an inconsistent state, causing SDI records to be absent.
System Crash During DDL
An unexpected server shutdown or crash while performing DDL operations (e.g., ALTER TABLE) can leave metadata in an inconsistent state.
Manual File Manipulation
Directly manipulating or deleting InnoDB data files outside of MySQL can sever the link between the table and its SDI.
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