From github issue: https://github.com/chef/ohai/issues/1411
AWS has announced they will be making changes to how the instance metadata endpoint works.
This may affect ohai.
See the announcement https://aws.amazon.com/about-aws/whats-new/2019/11/announcing-updates-amazon-ec2-instance-metadata-service/ and the user guide https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
A Chef customer has revealed that they will soon be required to use version 2 of the EC2 Instance Metadata Service.