Error: DynamoDB ConditionalCheckFailedException
Solution
In DynamoDB, when writing operations, Condition Expressions can be specified to determine whether operation should be actually performed.
ConditionalCheckFailedException is an error thrown by AWS SDK or CLI when the ConditionExpression evaluates to false. This is especially useful if you want to atomically check data without fetching and then writing. Examples include:
- Create an item if such doesn't exist yet
- Delete an item only if some attribute is defined
- Update user attribute only if user is active
Either remove ConditionExpression from your DynamoDB code or change parameters and data so the condition can be satisfied.
Other Common DynamoDB Errors (with Solutions)
- Unable to start DynamoDB Local process
- ConfigError: Missing region in config
- DynamoDB Key element does not match the schema
- DynamoDB ConditionalCheckFailedException
- DynamoDB ValidationException: Query condition missed key schema element
- DynamoDB Invalid UpdateExpression Syntax Error Token
- DynamoDB error cannot find module build/Release/DTraceProviderBindings
- sls dynamodb install not working
- DynamoDB Internal Server Error
- AWS DynamoDB errors ResourceNotFoundException
- ImportError: No module named boto3 (DynamoDB)
- AWS DynamoDB CredentialsError: Missing credentials in config
- DynamoDB Network Error: self signed certificate in chain
- ValidationException: Invalid KeyConditionExpression: Attribute name is a reserved keyword;
- ExpressionAttributeValues contains invalid value: One or more parameter values were invalid: An AttributeValue may not contain an empty string
- Error ValidationException: One or more parameter values were invalid: Type mismatch for key X expected: S actual: M
- One or more parameter values were invalid: some AttributeDefinitions are not used
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