MySQL Error 3990: GTID Mode Required

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Description

This error indicates an attempt to enable the Asynchronous Replication Connection Failover feature (SOURCE_CONNECTION_AUTO_FAILOVER) without GTID_MODE being globally enabled. MySQL's automatic failover for replication connections relies on Global Transaction Identifiers (GTIDs) to ensure data consistency and proper failover mechanisms.

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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 @@GLOBAL.GTID_MODE = ON.

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Known Causes

3 known causes

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GTID Mode Not Enabled

The primary cause is attempting to configure `SOURCE_CONNECTION_AUTO_FAILOVER = 1` when the `@@GLOBAL.GTID_MODE` variable is not set to `ON`.

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Incorrect Replication Configuration

The current replication setup may not have been initialized or configured with GTID mode enabled, which is a mandatory prerequisite for this specific failover feature.

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Feature Requirement Oversight

Users might try to enable advanced replication features without fully understanding their underlying dependencies, such as the need for GTID mode.

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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

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Related Errors

5 related errors