Amazon CloudFront - Collapsed request answered with Cache-Control: no-store

Question

Scenario:
- There has been no previous requests on an object.  
- CloudFront behavior is default (CacheOptimized).  
- Several requests enough to make request collapsing reached to one Edge Location  
- Origin server responded with Cache-Control: no-store

How does Amazon CloudFront react?

I think it will send all other requests to origin, but wanted to confirm.

Accepted Answer

CloudFront will collapse the request for traffic spike scenario regardless of no-store and/or no-cache directive.
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorCustomOrigin.html#request-custom-traffic-spikes

In the logs you will see something like "NonS3CollapsedHit" for something that's normally a MISS/uncacheable.

Amazon CloudFront - Collapsed request answered with Cache-Control: no-store

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