Document URL: https://docs.openshift.com/container-platform/3.9/upgrading/automated_upgrades.html#preparing-for-an-automated-upgrade Section Number and Name: Preparing for an Automated Upgrade Describe the issue: "Before attempting the upgrade, follow the guidance in [Environment health checks] to verify the cluster’s health. This will confirm that nodes are in the Ready state, running the expected starting version, and will ensure that there are no diagnostic errors or warnings." Environment health check link is incorrect https://docs.openshift.com/container-platform/3.9/day_two_guide/environment_health_checks.html.html#day_two_environment_health_checks correct: https://docs.openshift.com/container-platform/3.9/day_two_guide/environment_health_checks.html#day_two_environment_health_checks Note the additional ".html"
The link is working correctly.