Error
Error Code:
3094
MySQL Error 3094: Group Replication Applier Failed
Description
Error 3094 indicates that the applier module, a crucial component responsible for applying transactions in MySQL Group Replication, failed to start during the `START GROUP_REPLICATION` command. This prevents the MySQL instance from successfully joining the replication group and participating in data synchronization.
Error Message
The START GROUP_REPLICATION command failed as the applier module failed to start.
Known Causes
4 known causesIncorrect Group Replication Configuration
Essential Group Replication parameters like `server_id`, `gtid_mode`, or `binlog_format` might be misconfigured, preventing the applier from initializing correctly.
Insufficient User Privileges
The MySQL user executing `START GROUP_REPLICATION` might lack the necessary privileges (e.g., `REPLICATION_SLAVE_ADMIN`, `GROUP_REPLICATION_ADMIN`) to manage Group Replication.
Resource Limitations or Contention
System resource constraints (e.g., memory, file descriptors, disk I/O) or contention with other processes can hinder the applier module's ability to start its threads.
Corrupted or Inconsistent GTID/Binlog State
Issues with the binary logs or an inconsistent GTID (Global Transaction Identifier) state on the server can prevent the applier from initializing its replication position.
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