Logic App Stateless workflow calls stateful workflow, but doesn't return message body

Question

I'm trying to call Logic App stateful workflow from Stateless workflow, but it seems I don't receive the body message; To demonstrate the issue - The parent logic app workflow invokes two child workflows (both are identical workflows, only difference is: one of them stateless and the other one is stateful), interestingly I don't receive output body from stateful workflow. Please refer the attached screenshots. Looking forward to get some suggestions to fix the issue. Thanks, Deepak Shaw.

Answer 1

This behaviour is in line with the documentation:

Parent workflow	Child workflow	Child behavior
Stateful	Stateful	Asynchronous polling pattern or synchronous ("fire and forget") with "operationOptions": "DisableAsyncPattern" setting
Stateful	Stateless	Trigger and wait
Stateless	Stateful	Synchronous pattern ("fire and forget")
Stateless	Stateless	Trigger and wait

If you want your stateless workflow to wait and receive a response from the stateful workflow then instead of using the Invoke a workflow action you should use the HTTP action to send a request to the HTTP URL from your stateful workflow:

Then the HTTP response will contain a body.

Answer 2

• When you will invoke a stateful and stateless workflow from a stateless workflow then you will observe that the status code of both the invocations are 202 Accepted and 200 respectively. That's why it doesn't contain response body.
• But If you will invoke a stateful and stateless workflow from a stateful workflow then both returns 200 status code. So, you can use the stateful workflow to invoke both types of workflows if you wish to see the response body.
• I believe its an inbuild feature in the stateless workflow for stateful workflow.
• I have used a stateful parent workflow to invoke stateful and stateless workflows and got response body in both the cases.