Error
Error Code:
40
MySQL Error 40: OS Event Creation Failure
Description
This error indicates that MySQL was unable to create a necessary operating system event object for its internal timer notifier thread. It typically points to underlying resource limitations, permission issues, or configuration problems at the OS level, preventing MySQL from properly managing time-based operations.
Error Message
Failed to create event to interrupt timer notifier thread (OS errno %d).
Known Causes
4 known causesOS Resource Exhaustion
The operating system has reached its limit for creating new event objects, handles, or other synchronization primitives.
Insufficient OS Permissions
The MySQL process lacks the required operating system privileges to create the necessary event objects.
OS Configuration Limits
Operating system kernel parameters or user-level resource limits are configured too restrictively for MySQL's operational needs.
System Instability
General operating system instability or corruption might be interfering with the creation of critical OS resources.
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