This incident has been resolved.
[03:42 PM PDT] Between 11:49 AM PDT and 3:37 PM PDT, we experienced increased error rates and latencies for multiple AWS Services in the US-EAST-1 Region. Our engineering teams were immediately engaged and began investigating. We quickly narrowed down the root cause 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. Additionally, customers may have experienced authentication or sign-in errors when using the AWS Management Console, or authenticating through Cognito or IAM STS.