Upgrade HDF

Upgrading HDF installs your target software version onto each node in your cluster. You can perform either an express or a rolling upgrade.

Rolling Upgrade is not supported by NiFi. When you select the Rolling Upgrade option for the HDF stack, NiFi stops all services, and performs an Express Upgrade. Express Upgrades stops the NiFi Service completely, and restarts it with the new version installed.

1. From Admin | Stack and Versions | Versions, click Upgrade.
2. In the Upgrade Options pop-up window, click either Express Upgrade or Rolling Upgrade, and specify if you would like customized upgrade failure tolerance. If you select:
   • Skip all Service Check failures – Ambari skips any Service Check failures and completes the upgrade without requiring user intervention to continue. After all the Services have been upgraded Checks, you are presented with summary of the failures and an option to continue the upgrade or pause.
   • Skip all Slave Component failures – Ambari skips any Slave Component failures and completes the Slave components upgrade without requiring user intervention to continue. After all Slave Components have been upgraded, you are presented with a summary of the failures and an option to continue the upgrade or pause.
3. Click Proceed.
4. Once the upgrade completes, again confirm that you have performed the required manual steps and click Finalize.

From Admin | Stack and Versions | Versions, you are now able to see only the HDF version to which you upgraded.