Error
Error Code:
3642
MySQL Error 3642: Tablespace Engine Mismatch
Description
This error indicates that the storage engine specified for a tablespace (e.g., InnoDB, MyISAM) does not match the engine that MySQL expects or has recorded for that tablespace. It typically occurs when the database's internal metadata for a tablespace conflicts with the engine being used or requested for access.
Error Message
Engine '%s' does not match stored engine '%s' for tablespace '%s'
Known Causes
4 known causesConfiguration Drift After Migration
After a MySQL server upgrade or migration, the default or expected storage engine for tablespaces might have changed, leading to a mismatch with existing tablespace metadata.
Manual Engine Type Modification
Directly modifying configuration files or system tables in a way that changes the expected engine for a tablespace without proper database-level operations can cause this inconsistency.
Data File Corruption
Corruption in the tablespace's data files or issues during a database recovery process can lead to incorrect engine metadata being read or stored.
Incorrect Tablespace Import
Importing a tablespace from a different MySQL instance or environment where the default or assigned storage engine was different can trigger this error.
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