Error
Error Code:
4047
MySQL Error 4047: Replication Gap Resolution Conflict
Description
This error occurs in MySQL replication environments when attempting to use the `SQL_AFTER_MTS_GAPS` `UNTIL` clause while both `GTID_MODE` is `ON` and `SOURCE_AUTO_POSITION` is enabled (`1`). It indicates that the server cannot internally compute and close potential transaction execution gaps in the relay log due to this specific, incompatible configuration.
Error Message
The until clause SQL_AFTER_MTS_GAPS is being used for channel '%s' when GTID_MODE = ON and SOURCE_AUTO_POSITION=1 meaning the server did not compute internally what gaps may exist in the relay log transaction execution. To close any execution gaps use either the SQL_BEFORE_GTIDS or SQL_AFTER_GTIDS until clause.
Known Causes
4 known causesIncompatible UNTIL Clause Usage
The `SQL_AFTER_MTS_GAPS` clause is being used, which is not designed for environments where `GTID_MODE` is `ON` and `SOURCE_AUTO_POSITION=1`.
GTID Mode is Active
The MySQL server is configured with `GTID_MODE = ON`, meaning Global Transaction Identifiers are used for replication positioning and gap tracking.
Source Auto-Position Enabled
The replica's `SOURCE_AUTO_POSITION` setting is `1`, indicating it expects the source to manage its position, which conflicts with `SQL_AFTER_MTS_GAPS` in a GTID setup.
Incorrect Gap Resolution Strategy
An attempt was made to resolve replication execution gaps using a method (SQL_AFTER_MTS_GAPS) intended for older, non-GTID replication setups.
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