Error
Error Code:
5
MongoDB Error 5: Graph Contains Cycle
Description
This error occurs in MongoDB when a graph traversal operation, such as `$graphLookup`, detects a circular reference in the data. It means the system found a path where a node refers back to an ancestor, preventing further traversal without an infinite loop. This typically indicates an issue within the data structure itself.
Error Message
Graph Contains Cycle
Known Causes
4 known causesRecursive Data Structure Loops
Documents within the collection form a circular reference path, where a document's parent or ancestor eventually refers back to the document itself.
Incorrect $graphLookup Configuration
The `$graphLookup` aggregation stage is misconfigured, leading it to follow a path that creates a cycle in the graph traversal.
Self-Referencing Documents
A document directly or indirectly refers to itself within the specified graph traversal path, creating an immediate cycle.
Data Import Errors
Malformed data imported into the collection inadvertently introduced circular references that violate graph integrity.
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