Error
Error Code:
1099
MySQL Error 1099: Table Read Lock Prevents Update
Description
This error occurs when you attempt to perform an update or write operation on a MySQL table that is currently locked with a READ lock. A READ lock allows multiple sessions to read from the table concurrently but prevents any session from writing to it until the lock is released.
Error Message
Table '%s' was locked with a READ lock and can't be updated
Known Causes
3 known causesExplicit READ Lock
A session explicitly acquired a 'LOCK TABLES ... READ' on the table, which prevents any write operations from other sessions.
Unreleased Application Lock
An application or script acquired a READ lock on the table but failed to release it, leaving the table in a read-only state for updates.
Conflicting Transaction
Another transaction or process is holding a read lock on the table, preventing your current operation from performing updates.
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