You must ensure that your HDP cluster satisfies specific prerequisites before initiating the upgrade process.
You must review the Behavioral Changes.
You must have root, administrative, or root-equivalent authorization on the Ambari Server host and all Ambari Agent hosts in the cluster.
You must make a safe copy of the Ambari Server configuration file found at /etc/ambari-server/conf/
If your cluster is SSO-enabled, do not stop Knox before upgrading Ambari.
During the Ambari upgrade, the existing
ambari-env.sh file is
overwritten and a backup copy of
ambari-env.sh (with extension
.rpmsave) is created. If you have manually modified
ambari-env.sh (for example, to change Ambari Server heap), you must
reapply your changes in the new file.