A client observed their Nuxeo app asking for AWS credentials on every batch GET request. After a certain number of requests, AWS throttles the request, which leads to reduced batch upload performance.
The client asks for a new batch/id/status endpoint that retrieves the batch parameters by id without the additional AWS credentials query. There is already a refreshToken endpoint for the batch that retrieves the appropriate credentials for AWS and is in use by WebUI. Drive is not performing the same behavior, so any customization of the batch handler will break one or the other end-user products.