Upgrading from OCP3.5 to OCP3.6 keeps failing at ['Wait for master to restart']

Solution In Progress - Updated -

Issue

  • Running an upgrade on OCP3.5 to OCP3.6 via "/usr/share/ansible/openshift-ansible/playbooks/byo/openshift-cluster/upgrades/v3_6/upgrade.yml" but am hitting the below error:
TASK [Wait for master to restart] **************************************************************************************************************************************
fatal: [master1.example.com -> localhost]: FAILED! => {
    "changed": false,
    "elapsed": 601,
    "failed": true
}

MSG:
 Timeout when waiting for master1.example.com:22
  • The ansible inventory file has variable openshift_rolling_restart_mode=system expecting a complete check by restarting all the masters one by one in the cluster.

Environment

  • OpenShift Container Platform (OCP)
    • 3.5

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