Toolschecker has two URLs that check webservice functionality in Toolforge. Both of them are a bit unstable in behavior. It appears that they try to stop the services, but the actual job or k8s replica set end up still running with a blank service.manifest file. This is not ideal and triggers alerts. It may be as simple as extending some timeout somewhere.
Problem URLs:
http://checker.tools.wmflabs.org/webservice/gridengine
http://checker.tools.wmflabs.org/webservice/kubernetes