AWS said the root cause appeared to be an issue with a subsystem responsible for capacity management for AWS Lambda, which caused errors directly for customers (including through API Gateway) and indirectly through the use of other AWS services.
The issue appeared to impact dozens of AWS services at US-EAST-1 Region.
Some web site administrators also experienced authentication or sign-in errors when using the AWS Management Console.
https://health.aws.amazon.com/health/status
