Upgrading HDP to Cloudera Runtime 7.1.x This section helps you to upgrade from HDP 2.6.5.x to the Cloudera Runtime 7.1.x. Upgrade processThis topic describes available upgrade options, prerequisites, and the overall process. Cloudera encourages you to read through this entire document before starting the upgrade process, so that you understand the interdependencies and order of the steps. Cloudera recommends that you validate these steps in a test environment to adjust and account for any special configurations for your cluster.PrerequisitesTo perform an HDP intermediate bits upgrade using Ambari, your cluster must meet the following prerequisites. Meeting these prerequisites is essential for Ambari to know that the cluster is in a healthy operating mode and can successfully manage the upgrade process.Before you upgradeMake sure that you have reviewed and completed all prerequisites described in above. Register software repositoriesBefore you use Ambari to perform the stack upgrade, you must register the software repositories for the new target version with Ambari and then install the software on all hosts in the cluster.Install software on the hostsIf you have successfully registered the software repositories for the new target version with Ambari, you can now install the software on all hosts in the cluster.Pre-upgrade stepsYou must complete the pre-upgrade steps for the components and services that you are going to upgrade.Upgrading Ambari Metrics System and SmartSenseAs part of the Ambari 7.1.x.x release, the schema for the Ambari Metrics System has significantly changed. This change requires additional steps to be performed before upgrading to HDP intermediate bits. Because SmartSense depends on the Ambari Metrics System, SmartSense also requires similar handling. The following steps guide you through upgrading the Ambari Metrics System and SmartSense.Backing up Ambari infra data and migrating Atlas dataIn Ambari 7.1.x.x, Ambari Infra Solr uses Solr 7. For data stored in the existing Solr 5 implementation used by Ambari 2.6.2.x, the data stored in Ambari Infra must be backed up and the Ambari Infra Solr services must be upgraded. Perform the HDP upgradeAfter you have performed the required pre-upgrade steps and backed up all the relevant data, you can proceed with the process to upgrade your cluster to HDP intermediate bits.Post-HDP-upgrade tasksAfter the HDP cluster is upgraded to CDP Private Cloud Base, ensure that you check the cluster settings, migration, and restore settings are correct.Troubleshooting the HDP upgradeIn the event of a problem, contacting Cloudera Support is highly recommended. Alternatively, you can perform these troubleshooting procedures.