Error
Error Code:
41
MySQL Error 41: OS Timer Event Registration Failure
Description
This critical MySQL error indicates that the server's internal timer notifier thread failed to register a necessary event with the operating system's event queue. This failure often leads to the timer thread exiting, potentially causing instability or shutdown of the MySQL server. It points to underlying operating system resource limitations or system call issues.
Error Message
Failed to register timer event with queue (OS errno %d), exiting timer notifier thread.
Known Causes
4 known causesOperating System Resource Exhaustion
The underlying operating system lacks sufficient resources, such as file descriptors or process limits, for MySQL to successfully register timer events.
OS System Call Failure
A low-level operating system call required for timer event registration failed, possibly due to kernel issues, misconfiguration, or severe system load.
Incorrect OS Permissions or Security Context
Insufficient or incorrect operating system permissions for the MySQL process prevent it from interacting correctly with OS-level event queues.
Underlying System Instability
The operating system itself is unstable, corrupted, or experiencing critical errors that prevent applications from performing essential system calls.
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