Error
Error Code:
1556
MySQL Error 1556: Cannot Lock Log Tables
Description
This error occurs when an attempt is made to acquire a lock on a table that MySQL identifies as a 'log table'. MySQL's internal logging mechanisms and concurrency design for these tables do not permit explicit user-initiated locking operations, as they can interfere with system stability and performance.
Error Message
You can't use locks with log tables.
Known Causes
3 known causesExplicit Table Lock Attempt
An SQL statement, such as `LOCK TABLES`, was directly executed on a table that MySQL designates as a log table.
Internal Log Table Targeting
The operation attempted to apply a lock to internal MySQL log tables (e.g., `mysql.general_log`, `mysql.slow_log`), which are designed for concurrent, lock-free access.
Automated Process Locking
An automated process, such as a stored procedure, trigger, or an application's ORM, indirectly initiated a locking operation on a log table.
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