On OpenShift Container Platform atomic-openshift-master service fails with error "unable to confirm openshift-controller-manager lease exists: getsockopt: connection refused".

Issue

• On 3master OCP set-up, only one master works and other two fails to start atomic-openshift-master-controllers, atomic-openshift-master-api, and etcd.service services.

Mar 14 19:31:05 master2 atomic-openshift-master-controllers[2854]: E0314 19:31:05.578445    2854 leaderelection.go:124] unable to confirm openshift-controller-manager lease exists: Get https://master2.example.com/api/v1/namespaces/kube-system/endpoints/openshift-controller-manager: dial tcp 192.x.x.x:443: getsockopt: connection refused
 atomic-openshift-master-controllers.service - Atomic OpenShift Master Controllers
   Loaded: loaded (/usr/lib/systemd/system/atomic-openshift-master-controllers.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2018-03-14 14:56:50 EDT; 4h 34min ago