We have investigated issues with Amazon DNS service in us-east region.
It affects jobs processing and API availability of our components. Thanks for patience.
UPDATE:
AWS confirmed the problem - 5:15 AM PDT We are investigating elevated errors resolving the DNS hostname used to access the EC2 APIs.
AWS status update - 5:51 AM PDT We have identified the root cause of the issue causing errors resolving the DNS hostname used to access the EC2 APIs and are currently working to resolve.
AWS status update - [RESOLVED] Between 4:31 AM and 6:10 AM PDT, we experienced errors resolving the DNS hostnames used to access some AWS services in the US-EAST-1 Region. During the issue, customers may have experienced failures indicating "hostname unknown" or "unknown host exception" when attempting to resolve the hostnames for AWS services and EC2 instances. This issue has been resolved and the service is operating normally.