Donghui0 opened a new issue #421: URL: https://github.com/apache/apisix-ingress-controller/issues/421
### Issue description controller log as below:  upstream delete failed, The delete event is added to the queue again. ### Environment * apisix-ingress-controller version: v0.5.0 * Kubernetes cluster version: v1.16.9 ### Minimal test code / Steps to reproduce the issue 1. create apisix route, service field references an existing k8s service. 2. delete apisix route resouce ### What's the actual result? (including assertion message & call stack if applicable) the delete event keeps retrying.... ### What's the expected result? ignore related upstream  add resp.StatusCode != 400 condition ? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
