Warning
Error Code:
75
MongoDB Error 75: Legacy Write Concern Usage
Description
MongoDB Error 75, "Write Concern Legacy O K", indicates that a write operation was performed using a legacy or deprecated write concern configuration. While the operation likely succeeded, this warning signals that the application is relying on older behavior that may not provide modern durability guarantees or is no longer recommended.
Error Message
Write Concern Legacy O K
Known Causes
3 known causesUsing Deprecated Write Concern 'w:0'
This warning often occurs when a write operation specifies a write concern of `w:0` (no acknowledgment from the server) without explicitly requesting journal or fsync guarantees, which is a legacy behavior.
Outdated Driver or Legacy Command
Applications using older MongoDB drivers or directly issuing the deprecated `getLastError` command may trigger this warning due to their default or specified write concern settings.
Application Code Not Updated
The application code might be using deprecated write concern syntax or implicitly relying on legacy behaviors that are now flagged by 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