Explanation:
You cannot configure Amazon CloudFront to log cookies for RTMP distributions. For web distributions,
CloudFront by default doesn’t consider cookies when caching your objects in edge locations. If your origin returns two objects and they differ only by the values in the Set-Cookie header, CloudFront caches only one version of the object.
Reference: http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Cookies.html