Error
Error Code:
39
MySQL Error 39: Timer Notification Thread Startup Failure
Description
MySQL Error 39, 'Failed to start timer notify thread', indicates that a critical internal background thread responsible for timed events and notifications could not be initialized. This often occurs during MySQL server startup and can prevent the database from launching or operating correctly, as essential scheduled tasks cannot be managed.
Error Message
Failed to start timer notify thread.
Known Causes
4 known causesSystem Resource Exhaustion
The operating system may lack sufficient memory, CPU, or available thread handles to allocate for the MySQL timer notify thread.
Operating System Permissions
Insufficient user permissions for the MySQL process prevent it from creating new threads or accessing required system resources.
MySQL Configuration Conflict
Certain MySQL server configuration settings or loaded plugins might conflict with the timer notify thread's initialization process.
System Library or Kernel Limits
Issues with core operating system libraries or overly restrictive kernel parameters (e.g., ulimit) may prevent the timer notify thread from being created.
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