See README for the architecture of SKFE.
kubectl get pods -lapp=envoy-skia-org
kubectl logs -f -lapp=envoy-skia-org
This really shouldn‘t happen since the entire config for envoy is static and envoy shouldn’t even start with an invalid config. Check envoy logs and maybe check the filesystem that the config file hasn't become corrupted.
Check envoy logs for errors. Did a backend go away?
Check envoy logs for errors. Did a backend go away?