Error
Error Code:
81
MongoDB Error 81: Query Parsing Failure
Description
This error indicates that MongoDB's query parser failed to understand or match a part of the query, aggregation pipeline stage, or expression against its expected grammar. It typically occurs when the provided syntax is malformed, incomplete, or incorrectly uses operators.
Error Message
No Match Parse Context
Known Causes
4 known causesMalformed Query Syntax
The query, update statement, or filter expression contains syntax errors such as missing commas, incorrect operators, or unbalanced parentheses/brackets.
Incorrect Aggregation Stage Syntax
An aggregation pipeline stage is malformed, uses an invalid operator, or has arguments that do not conform to the expected syntax for that stage.
Invalid Regular Expression Pattern
A regular expression used within a query or aggregation stage is syntactically incorrect or improperly escaped, preventing the parser from understanding it.
Unsupported Query Operator
The query attempts to use an operator or syntax that is not supported by the current MongoDB version or is used in an invalid context.
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