I have configured AWS S3 and a lambda function which triggers when a file is inserted into S3. I have configured an event s3:ObjectCreated:CompleteMultipartUpload in lambda to trigger. When I tested through AWS CLI with large files it worked. But when I upload a smaller file with size less than 5 MB, the event is not triggering the lambda. How can I do this for small size files with only one part? Anyone please help....