AWS Lambda Function scenarios to Access DynamoDB with 'AccessDeniedException' Despite Correct Permissions
I'm stuck on something that should probably be simple... This might be a silly question, but After trying multiple solutions online, I still can't figure this out. I'm currently working with an scenario with my AWS Lambda function that needs to access a DynamoDB table. The Lambda function is throwing an `AccessDeniedException` when trying to perform a `GetItem` operation, even though I have set the IAM role's permissions correctly. The IAM role attached to the Lambda function includes the following policy: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "dynamodb:GetItem", "Resource": "arn:aws:dynamodb:us-east-1:123456789012:table/MyTable" } ] } ``` I double-checked that the ARN of the DynamoDB table is correct and that the IAM role is correctly assigned to the Lambda function. The Lambda function's execution role does include the necessary permissions. Additionally, I also verified that the region specified in both the Lambda and the DynamoDB table is the same (us-east-1). To troubleshoot, I added logging to the Lambda function to print out the behavior message, which I am seeing as follows: ``` behavior: AccessDeniedException: User: arn:aws:sts::123456789012:assumed-role/MyLambdaRole/MyLambdaFunction is not authorized to perform dynamodb:GetItem on resource arn:aws:dynamodb:us-east-1:123456789012:table/MyTable ``` I also tried invoking the Lambda function manually and through an API Gateway but encountered the same behavior. As a temporary measure, I expanded the policy to allow `dynamodb:*` to see if that resolved the scenario, which it did. However, I want to limit permissions to adhere to best practices. Can someone guide to understand why the original permissions aren't working and how I can fix this without opening up access too broadly? I'm working on a mobile app that needs to handle this. For context: I'm using Javascript on Ubuntu 22.04. Thanks for your help in advance! I recently upgraded to Javascript 3.10.