20. Finalizing Your Upgrade

When you are satisfied that HDP is successfully functioning with the data from your HDP 2.2 cluster, finalize the upgrade.

	Warning
	Once you have finalized the upgrade, you cannot revert.

Open a command prompt with the hadoop user in the HDFS Home directory:
```
runas /user:hadoop "cmd /K cd %HDFS_HOME%\bin"
```
Finalize the upgrade:
```
hdfs dfsadmin -finalizeUpgrade 
```