Error
Error Code:
238
MongoDB Error 238: Feature Not Implemented
Description
This error indicates that the requested operation or feature is not implemented in the current MongoDB server or client version. It often arises when attempting to use a function, command, or query syntax that is either deprecated, not yet released, or specific to a different MongoDB configuration.
Error Message
Not Implemented
Known Causes
3 known causesVersion Mismatch
Attempting to use a command or feature introduced in a later MongoDB version against an older server instance.
Deprecated Feature Usage
Executing a command or query syntax that has been deprecated and removed in the current MongoDB version being used.
Missing Module/Configuration
The requested functionality relies on a specific server module or configuration that is not installed or enabled.
Solutions
3 solutions available1. Verify MongoDB Version Compatibility easy
Ensure the MongoDB version you are using supports the feature you are trying to access.
1
Identify the MongoDB version you are currently running.
db.version()2
Consult the official MongoDB documentation for your specific version to confirm if the feature you are attempting to use is supported. Features are often introduced or deprecated between major versions.
Visit the MongoDB Manual (https://docs.mongodb.com/manual/)3
If the feature is not supported in your current version, plan to upgrade your MongoDB deployment to a version that does. Refer to the MongoDB upgrade documentation for detailed instructions.
Refer to MongoDB upgrade guides: https://docs.mongodb.com/manual/release-notes/)2. Check Feature Availability for Edition easy
Some advanced features are only available in specific MongoDB editions (e.g., Enterprise).
1
Determine which MongoDB edition you are using (e.g., Community, Enterprise, Atlas).
This information is typically found in your deployment setup or by checking license details.2
Review the MongoDB documentation for the specific feature you are trying to use and check its availability across different editions.
Example: Search for the feature in the MongoDB Manual and look for edition-specific notes.3
If the feature is exclusive to a different edition, consider upgrading your MongoDB license or migrating to a supported edition (e.g., MongoDB Atlas, which offers a wide range of features).
Contact MongoDB sales for licensing inquiries or explore MongoDB Atlas features: https://www.mongodb.com/cloud/atlas)3. Review Command or API Usage medium
Ensure you are using the correct syntax and parameters for the command or API call.
1
Carefully examine the command or API call that is triggering the 'Not Implemented' error.
Example: If you're using a driver, check the specific method call and its arguments.2
Compare your usage against the official MongoDB documentation for the relevant command or API. Look for any deprecated or experimental features that might not be fully implemented or require specific flags.
Refer to the MongoDB Shell documentation (mongosh) or the documentation for your specific MongoDB driver (e.g., Node.js, Python).3
Verify that you are not attempting to use a feature that is marked as experimental or in preview without enabling it explicitly, if such an option exists for that feature.
Check feature flags or configuration options in the MongoDB documentation.