title: Kubernetes scheduler: watch of *api.Pod ended with error: unexpected end of JSON input
body: <p>Yesterday service worked fine. But today when i checked service's state i saw:</p>
  
  <pre><code>Mar 11 14:03:16 coreos-1 systemd[1]: scheduler.service: main process exited, code=exited, status=2/INVALIDARGUMENT
  Mar 11 14:03:16 coreos-1 systemd[1]: Unit scheduler.service entered failed state.
  Mar 11 14:03:16 coreos-1 systemd[1]: scheduler.service failed.
  Mar 11 14:03:16 coreos-1 systemd[1]: Starting Kubernetes Scheduler...
  Mar 11 14:03:16 coreos-1 systemd[1]: Started Kubernetes Scheduler.
  Mar 11 14:08:16 coreos-1 kube-scheduler[4659]: E0311 14:08:16.808349    4659 reflector.go:118] watch of *api.Service ended with error: very short watch
  Mar 11 14:08:16 coreos-1 kube-scheduler[4659]: E0311 14:08:16.811434    4659 reflector.go:118] watch of *api.Pod ended with error: unexpected end of JSON input
  Mar 11 14:08:16 coreos-1 kube-scheduler[4659]: E0311 14:08:16.847595    4659 reflector.go:118] watch of *api.Pod ended with error: unexpected end of JSON input
  </code></pre>
  
  <p>It's really confused 'cause etcd, flannel and apiserver work fine.</p>
  
  <p>Only some strange logs are for etcd:</p>
  
  <pre><code>Mar 11 20:22:21 coreos-1 etcd[472]: [etcd] Mar 11 20:22:21.572 INFO      | aba44aa0670b4b2e8437c03a0286d779: warning: heartbeat time out peer="6f4934635b6b4291bf29763add9bf4c7" missed=1 backoff="2s"
  Mar 11 20:22:48 coreos-1 etcd[472]: [etcd] Mar 11 20:22:48.269 INFO      | aba44aa0670b4b2e8437c03a0286d779: warning: heartbeat time out peer="6f4934635b6b4291bf29763add9bf4c7" missed=1 backoff="2s"
  Mar 11 20:48:12 coreos-1 etcd[472]: [etcd] Mar 11 20:48:12.070 INFO      | aba44aa0670b4b2e8437c03a0286d779: warning: heartbeat time out peer="6f4934635b6b4291bf29763add9bf4c7" missed=1 backoff="2s"
  </code></pre>
  
  <p>So, I'm really stuck and don't know what's wrong. How can i resolve this problem? Or, how can i check details log for scheduler.
  <code>journalctl</code> give me same logs like <code>systemd status</code></p>