Error
Error Code:
13113
MongoDB Error 13113: Merge Stage No Document
Description
This error occurs in a MongoDB aggregation pipeline when the `$merge` stage attempts to write documents to a target collection but cannot find a matching document based on the specified `on` field or `whenMatched` criteria. It typically indicates that the incoming documents from the pipeline do not have corresponding matches in the target collection as expected for an update or replacement operation.
Error Message
Merge Stage No Matching Document
Known Causes
4 known causesIncorrect 'on' Field Specification
The `on` field defined in the `$merge` stage does not correctly identify existing documents in the target collection, leading to no matches.
Missing or Mismatched Data in Target Collection
The target collection is empty, or the documents it contains do not have values that match the incoming documents on the specified `on` field.
Data Type Inconsistencies
The data types of the fields used in the `on` specification differ between the incoming documents and the target collection, preventing a successful match.
Empty Input to '$merge' Stage
The aggregation pipeline preceding the `$merge` stage filters out all documents, resulting in an empty input stream for the merge operation.
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