Error
Error Code:
4049
MySQL Error 4049: Operation on Group Replication Secondary
Description
This error occurs when a user or application attempts to execute a write operation, DDL statement, or certain administrative commands on a MySQL server configured as a secondary member in a Group Replication cluster. Group Replication enforces that such operations are only performed on the primary member to maintain data consistency and avoid conflicts.
Error Message
This operation cannot be performed on a Group Replication secondary member, it must be done on the group primary.
Known Causes
3 known causesOperating on a Secondary Member
The database connection was directed to a MySQL server that is currently a secondary replica in a Group Replication cluster, which does not allow the requested operation.
Application Targeting Secondary
The client application or script is attempting to execute a restricted command on a Group Replication secondary member due to incorrect connection string or routing logic.
Unaware of Server Role
The user or automated process did not recognize that the connected MySQL instance was a secondary member of a Group Replication group, leading to an invalid operation attempt.
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