Error
Error Code:
1803
MySQL Error 1803: Slave MTS Recovery Failure
Description
This error indicates that a MySQL replication slave, configured for parallel execution (Multi-Threaded Slave - MTS), encountered an unrecoverable error. The slave was unable to automatically resume replication after a previous failure or shutdown, requiring manual intervention to restore its state. It typically occurs during slave startup or after a crash.
Error Message
Cannot recover after SLAVE errored out in parallel execution mode. Additional error messages can be found in the MySQL error log.
Known Causes
4 known causesUnhandled Slave Error
The multi-threaded slave encountered a critical error during parallel event application that prevented automatic recovery.
Inconsistent Slave State
The slave's data or internal replication metadata became inconsistent, making it unable to determine a valid point for recovery.
Corrupted Relay Logs
The relay log files, which store events from the master, were corrupted or unreadable, preventing the slave from processing pending transactions.
Improper Slave Shutdown
The slave instance was not gracefully shut down, leaving replication threads in an unrecoverable state upon restart.
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