Error
Error Code:
1756
MySQL Error 1756: Inconsistent Replication Data
Description
MySQL Error 1756, identified by `ER_MTA_INCONSISTENT_DATA`, indicates that the Multi-Threaded Applier (MTA) in a replication setup has encountered data inconsistencies. This error typically arises when the replica's data state diverges unexpectedly from the source, preventing the successful application of new events or transactions.
Error Message
%s
Known Causes
4 known causesManual Replica Data Modification
Unauthorized or accidental direct data changes (DML or DDL) on the replication replica can lead to a state inconsistent with the source server.
Non-Transactional Operations on Source
Certain non-transactional operations on the source, or operations that do not fully commit atomically, can sometimes cause data inconsistencies on the replica during application.
Improper Replica Shutdown or Crash
An unexpected crash or incorrect shutdown of the replica server can leave its data in an inconsistent state, preventing further replication from resuming cleanly.
MySQL or Storage Engine Bug
Infrequent bugs within the MySQL server itself or the underlying storage engine (e.g., InnoDB) can lead to unexpected data inconsistencies under specific workloads or conditions.
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