title: Occasional Unknownhost Exception from for a service within kubernetes
body: <p>I have a kubernetes cluster setup on AWS. When i make call to elasticsearch-client.default.svc.cluster.local from a pod, i get unknown host exception occasionaly. It must have something to do with the name resolution, coz hitting the service IP directly works fine. </p>
  
  <p>Note : I already have kube-dns autoscaler enabled. I manually tried with almost 6 kube-dns pods. SO i dont think it is because of dns pod scaling.</p>
  
  <p>When I set the kube-dns configMap with the upstreamserver values to google nameservers (8.8.8.8 and 8.8.4.4) I am not getting the issue. I assume it is because of api ratelimiting done by AWS on route53. But I dont know why the name resolution request would got to AWS NS.</p>