Error
Error Code:
334
MongoDB Error 334: Authentication Mechanism Unavailable
Description
MongoDB Error 334, "Mechanism Unavailable," indicates that the database server cannot find or use the specified authentication mechanism during a connection or authentication attempt. This typically occurs when there's a mismatch between the authentication method requested by the client and what the server is configured to support, or when external authentication systems are inaccessible.
Error Message
Mechanism Unavailable
Known Causes
4 known causesMisconfigured Auth Mechanism
The authentication mechanism specified in the client's connection string or by the application does not match any mechanism configured or supported by the MongoDB server.
Server Auth Configuration Missing
The MongoDB server's security configuration (e.g., `security.authenticationMechanisms`) does not include the authentication mechanism that the client is attempting to use.
External System Unreachable/Misconfigured
If using external authentication systems like LDAP or Kerberos, the MongoDB server might be unable to reach them or they are improperly configured.
Client Driver Incompatibility
The client driver or library version might not support the specific authentication mechanism configured on the MongoDB server.
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