Push requests from a topic time out after 5 seconds if the HTTP endpoint does not respond.
When you create a subscription with the push type set to HTTP, Simple Message Queue (formerly MNS) pushes messages to the specified HTTP endpoint. The endpoint must return an HTTP status code in the 2xx range within 5 seconds. Otherwise, the push request times out and Simple Message Queue (formerly MNS) retries the request. For more information about the notification strategy, see NotifyStrategy.