Summary:We have a workflow which is calling a web service. This web service may take several minutes to complete its operations. Will the workflow wait for the web service to complete before processing the next action?
Product:All Workflow for SharePoint on-premises
The call web service action has a timeout of 100 seconds so if a request has not finished by then it will fail. It would not be recommended to have long requests because while the workflow is waiting for a response, it is actively using SharePoint resources. Generally workflows are active for a very short time until they are 'put to sleep' with either a delay action or an action that requires a task to be completed.