A push request times out if the specified HTTP endpoint does not respond to the request within 5 seconds.
When you create a subscription, you set HTTP as the push type and enter an HTTP endpoint. Then, MNS pushes messages to the specified HTTP server. If the HTTP server fails to return an HTTP status code (200 to 299) within 5 seconds, the push request times out. MNS attempts to send the request again. For information about the notification strategy, see NotifyStrategy.