Error
Error Code:
11
MySQL Error 11: File Unlock Failure
Description
MySQL Error 11, 'Can't unlock file,' indicates that the database server attempted to release a file lock but was prevented from doing so by the operating system. This typically occurs during operations requiring exclusive file access, such as table maintenance, schema changes, or database recovery, when another process or system issue holds an exclusive lock or prevents its release.
Error Message
Can't unlock file (OS errno %d - %s)
Known Causes
3 known causesExternal Process Lock
Another application or operating system process is holding an exclusive lock on a file that MySQL needs to unlock.
Insufficient Permissions
The MySQL user or process lacks the necessary operating system permissions to unlock the specific database file.
File System Issue
Underlying file system corruption, an issue with the storage device, or network file system problems are preventing proper lock management.
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