For a deeper look into our DataScope Select REST API, look into:
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We use the following endpoint:
to force a schedule on DSS REST API.
We have noticed that no response comes back after 30 seconds. For long running requests we would expect a response with a HTTP StatusCode of 202 Accepted and a "monitor" url in the Location header to come back after that time.
We do not provide the Prefer header.
The call made before ScheduleExtractNow - RequestToken is successful.
I can provide ClientSessionId if required?
According to the Async key machanism, the API defaults to synchronous responses.
For long running requests, you need to define "respond-async" in the Prefer header to receive asynchronous responses such as HTTP statusCode of 202 Accepted and a monitor url.
Could you try adding the "respond-async" in the Prefer header?
I can add the "Prefer:respond-async" header, but let me just understand what is going on at the moment when I send requests to the API.
Ok so my request is treated as synchronous, so should I wait indefinitely for a response from the API? I will not receive a 202 response after a certain amount of time?
What does the "30 second timeout" refer to in the following documentation:
under the "How can I set my request to be asunchronous or sunchronous?" header?
If the request is synchronous, you need to wait indefinitely for a response from API. You will not receive any 202 response. However, as stated in the Async Key mechanisms, this will fail if the request takes more than 25 minutes to process, after which the Thomson Reuters firewalls will disconnect the idle request.
According to ODATA spec, the wait preference is used to specify upper bound on the length of time, in seconds, the client is prepared to wait for the service to process the request synchronously once it has been received.
As an added note to Veerapath's excellent answers, it is a best practice to systematically add the "respond-async" in the Prefer header, because by defining that you want to use async mode there is no uncertainty on the workflow, and your program can work on other things instead of waiting idly for results.
