AWS Lambda Function Not Triggering from S3 Event Notification Despite Correct Configuration
Quick question that's been bugging me - I'm encountering an issue where my AWS Lambda function is not being triggered by S3 event notifications. I've configured my S3 bucket to send notifications for 's3:ObjectCreated:*' events to my Lambda function, but it seems like the events are not firing as expected. Here's the code snippet for my Lambda function: ```python import json def lambda_handler(event, context): # Sample log to check the event payload print(json.dumps(event)) return { 'statusCode': 200, 'body': json.dumps('Event processed!') } ``` I verified that the Lambda function has the correct permissions by attaching the necessary IAM role with the following policy: ```json { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "lambda:InvokeFunction", "Resource": "arn:aws:lambda:us-east-1:123456789012:function:myLambdaFunction" }, { "Effect": "Allow", "Action": "s3:PutObject", "Resource": "arn:aws:s3:::my-bucket/*" } ] } ``` Additionally, I confirmed that the event notification configuration in the S3 console looks correct: ```json { "NotificationConfiguration": { "LambdaFunctionConfigurations": [ { "LambdaFunctionArn": "arn:aws:lambda:us-east-1:123456789012:function:myLambdaFunction", "Events": ["s3:ObjectCreated:*"] } ] } } ``` I have checked CloudWatch logs for my Lambda function, but I don't see any invocation attempts when I upload files to the bucket. I've also tried different file types and sizes, but nothing seems to trigger the function. Am I missing something in the configuration, or is there a potential issue with how AWS services are communicating? Any insights would be appreciated! For reference, this is a production service. Any help would be greatly appreciated!