AWS SNS Notifications Not Triggering After Message Publish from Lambda in Python 3.8
I'm following best practices but Quick question that's been bugging me - I've been working on this all day and Can someone help me understand I've searched everywhere and can't find a clear answer... I am currently experiencing an scenario where my AWS Lambda function, written in Python 3.8, is successfully publishing messages to an SNS topic, but the notifications are not being sent out to the subscribed endpoints. Here’s the relevant portion of my Lambda function code: ```python import boto3 import json def lambda_handler(event, context): sns_client = boto3.client('sns') message = {'key': 'value'} response = sns_client.publish( TopicArn='arn:aws:sns:us-west-2:123456789012:MyTopic', Message=json.dumps(message), Subject='Test Notification' ) return response ``` The message publishes without any errors, and I can see the published message in the AWS SNS console, but the notifications are not being delivered to the subscribed SQS queue or the email endpoints. I've checked the following: - The SNS topic has the correct subscriptions set up, including an SQS queue and an email address. - The subscriptions are confirmed, and the SQS queue has the correct permissions to allow SNS to send messages to it. - I have configured the Lambda function with the appropriate IAM role that includes permissions for `sns:Publish`. - The message format and encoding are as per SNS guidelines. I also tried to enable CloudWatch logs for the SNS topic to see if there are any behavior messages or insights, but it only logs the message published successfully and not any delivery attempts. When I test the SNS topic directly from the AWS console, the notifications are sent without any issues, which makes me think the question is related to how the Lambda function is interacting with SNS or possibly the IAM permissions. Has anyone else encountered this scenario or might have any suggestions on how to troubleshoot further? Any insights would be greatly appreciated! For context: I'm using Python on Ubuntu. Thanks in advance! This is my first time working with Python stable. I'm working on a service that needs to handle this. I'd love to hear your thoughts on this. What are your experiences with this? I'd really appreciate any guidance on this.