Error
Error Code:
78
MongoDB Error 78: Unexpected Command Output Schema
Description
This error indicates that the result returned by a MongoDB command does not conform to the schema expected by the client application or driver. It typically occurs when the client anticipates a specific structure for the command's output, but the MongoDB server provides a different format. This can signal an incompatibility between client and server, or an issue with the command itself.
Error Message
Command Result Schema Violation
Known Causes
3 known causesClient/Server Version Mismatch
Your application's MongoDB driver or client library might be expecting a different schema for command results than what the server is actually providing, often due to version discrepancies.
Malformed Command Parameters
The command or query sent to the MongoDB server contains incorrect parameters or options, causing the server to return a result that doesn't match the expected schema.
Unexpected Server Response
The MongoDB server might return an unexpected result schema due to an internal issue, a specific configuration, or a recent server-side behavior change.
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