Error
Error Code:
1685
MySQL Error 1685: Modifying Binlog Variable in Transaction
Description
This error indicates an attempt to alter the `@@session.binlog_direct_non_transactional_updates` system variable while an active SQL transaction is currently open. MySQL prevents such modifications mid-transaction to ensure data consistency and predictable behavior, especially concerning binary logging and replication processes.
Error Message
Cannot modify @@session.binlog_direct_non_transactional_updates inside a transaction
Known Causes
3 known causesAltering Session Variable Mid-Transaction
An SQL statement or application code attempts to change `@@session.binlog_direct_non_transactional_updates` after a `START TRANSACTION` or implicit transaction has begun, but before it's committed or rolled back.
Improper Transaction Scope
The application logic initiates a transaction, then attempts to configure critical session variables related to binlog behavior before the transaction concludes, leading to this conflict.
Scripted Configuration Conflict
A script designed to configure MySQL session settings runs a `SET` command for this variable while another part of the script or a concurrently running process has an open transaction.
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