Error
Error Code:
258
MongoDB Error 258: Unknown Feature Compatibility Version
Description
MongoDB Error 258, 'Unknown Feature Compatibility Version', indicates that the database encountered a feature compatibility version (FCV) it does not recognize or support. This critical error often occurs during server startup, upgrades, or when an unsupported FCV is detected, preventing the server from operating correctly.
Error Message
Unknown Feature Compatibility Version
Known Causes
4 known causesIncompatible MongoDB Version
The configured or detected FCV is not supported by the currently running MongoDB server version.
Corrupted FCV Metadata
The internal feature compatibility version data within the database files might be damaged or unreadable.
Manual Misconfiguration
The FCV was manually set to an invalid or unrecognized value through direct database commands or configuration.
Downgrade Attempt
A lower MongoDB version is attempting to start with data files that have an FCV set for a newer, incompatible version.
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