Etcd failing to list members and timeouts with messages as "failed to send out heartbeat on time" in RedHat OpenShift Container Platform v3.9

Issue

• Etcd unable to start and timing out in RedHat OpenShift Container Platform (OCP) v3.9.

• Following messages are seen in etcd healthchecks

# etcdctl --cert-file /etc/origin/master/master.etcd-client.crt --key-file /etc/origin/master/master.etcd-client.key --ca-file /etc/origin/master/master. etcd-ca.crt --endpoints="https://XX.XX.XX.XX:2379,https://XX.XX.XX.XX:2379,https://XX.XX.XX:2379" cluster-health

cluster may be unhealthy: failed to list members

# etcdctl --cert-file /etc/origin/master/master.etcd-client.crt --key-file /etc/origin/master/master.etcd-client.key --ca-file /etc/origin/master/master. etcd-ca.crt --endpoints="https://XX.XX.XX.XX:2379,https://XX.XX.XX.XX:2379,https://XX.XX.XX.XX:2379" cluster-health

cluster may be unhealthy: failed to list members
Error:  client: etcd cluster is unavailable or misconfigured; error #0: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout
; error #1: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout
; error #2: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout

error #0: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout
error #1: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout
error #2: client: endpoint https://XX.XX.XX.XX:2379 exceeded header timeout