MySQL Error 3991: Replication Failover Requires Auto-Position

📋

Description

This error occurs when you attempt to enable the `SOURCE_CONNECTION_AUTO_FAILOVER` feature for asynchronous replication without first enabling the `SOURCE_AUTO_POSITION` option. MySQL requires `SOURCE_AUTO_POSITION` to be active for the connection failover mechanism to function correctly.

💬

Error Message

Failed to enable Asynchronous Replication Connection Failover feature. The CHANGE REPLICATION SOURCE TO SOURCE_CONNECTION_AUTO_FAILOVER = 1 can only be set when SOURCE_AUTO_POSITION option of CHANGE REPLICATION SOURCE TO is enabled.

🔍

Known Causes

3 known causes

⚠️

Missing SOURCE_AUTO_POSITION

You attempted to enable `SOURCE_CONNECTION_AUTO_FAILOVER` in your `CHANGE REPLICATION SOURCE TO` statement without also setting `SOURCE_AUTO_POSITION = 1`.

⚠️

Incorrect Replication Configuration

The replication setup is misconfigured, specifically regarding the prerequisites for advanced features like asynchronous connection failover.

⚠️

Feature Dependency Oversight

The command was executed without awareness that `SOURCE_CONNECTION_AUTO_FAILOVER` has a strict dependency on `SOURCE_AUTO_POSITION` being active.

🛠️

Solutions

Coming Soon

Detailed 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

Find Help

Stack Overflow Google Search Official Docs

🔗

Related Errors

5 related errors