Error
Error Code:
1165
MariaDB Error 1165: Delayed Insert Table Locked
Description
This error occurs when an `INSERT DELAYED` statement attempts to write to a table that is currently locked by another session or operation using `LOCK TABLES`. MariaDB prevents `INSERT DELAYED` from operating on explicitly locked tables to maintain data consistency and prevent deadlocks.
Error Message
INSERT DELAYED can't be used with table '%s' because it is locked with LOCK TABLES
Known Causes
4 known causesExplicit Table Lock
Another client session or an application has explicitly locked the target table using `LOCK TABLES` for read or write operations.
Ongoing Transaction Lock
A long-running transaction or a session holding a lock on the table prevents `INSERT DELAYED` from acquiring necessary resources.
Schema Modification
A Data Definition Language (DDL) operation like `ALTER TABLE` is in progress, which often acquires exclusive locks on the table.
Backup or Maintenance Activity
A database backup process or a maintenance script might have locked tables to ensure data integrity during its operation.
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