resources that poll can timeout

If polling is used, the poll has no timeout, and if it takes longer than CloudFormation's 1 hour max time for a custom resource, the stack fails with a timeout error and the lambda continues polling indefinitely.

https://github.com/aws-quickstart/quickstart-amazon-eks/issues/19

Start by reviewing this issue and the linked quickstart-amazon-eks report to understand the polling timeout scenario. Trace the polling entry point in the repository and verify the behavior around CloudFormation's one-hour custom-resource limit. Done means polling stops before the limit and the Lambda does not continue indefinitely.

Written by the indexing model from the issue text.