Error
Error Code:
2042
MySQL Error 2042: Shared Memory Allocation Failure
Description
This error indicates that the MySQL client application failed to allocate or open a shared memory file mapping. This typically occurs when a client attempts to connect to a local MySQL server instance using the shared memory protocol, but the operating system prevents the necessary memory resources from being assigned. It often points to resource limitations, permissions issues, or conflicting processes on the client machine.
Error Message
Can't open shared memory; client could not allocate file mapping (%lu)
Known Causes
4 known causesInsufficient System Resources
The operating system may lack sufficient available memory or handles to create the shared memory file mapping required by the MySQL client.
Operating System Permissions
The user account running the MySQL client application may not have the necessary permissions to create or access shared memory objects on the system.
Conflicting Processes or Malware
Another application or process, potentially malware, might be consuming or blocking access to shared memory resources, preventing MySQL from allocating its own.
Incorrect Client Configuration
The MySQL client might be configured to use shared memory for connection, but the server is not set up to accept shared memory connections, or the client configuration is malformed.
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