From Ambari, go to Manage Versions and update the HDF base URL. See the HDF Release Notes for the HDF base URL appropriate for your Operating System.

For example:

http://public-repo-1.hortonworks.com/HDF/centos6/3.x/updates/3.1.2.0

Verify that /etc/yum.repo.d/ambari-hdp-2.repo has the updated HDF base URL. If it does not, manually edit this file to set the correct base URL.

Confirm the current NiFi components and version. For example:

[root@host registry]# yum list installed | grep nifi
nifi_3_0_2_0_76.x86_64

Display the current version associated with each component. For example:

[root@host registry]# hdf-select status | grep nifi
nifi - 3.0.2.0-76
nifi-registry - None

Install binaries for the HDF services you want to upgrade.

See the HDF Release Notes for the repository information, including service version and build number.

[root@host ~]# yum install -y nifi_3_1_2_0_<build-number>*

	Note
	Only run the yum install command on Ambari Agent hosts where NiFi is already installed.

Ensure that no NiFi processes are present on your cluster nodes:

ps aux | grep nifi

If processes are still running, execute the following and ensure that no processes are available:

"export JAVA_HOME=/usr/jdk64/{YOUR_JAVA_VERSION};/usr/hdf/current/nifi/bin/nifi.sh stop >> /var/log/nifi/nifi-setup.log"

Where YOUR_JAVA_VERSION is the Java version you are running on your HDF cluster nodes.

Use hdf-select to ensure that you have created the appropriate links to the new NiFi installation:

[root@host ~]# hdf-select set nifi 3.1.2.0-<build-number>

Confirm that hdf-select displays the new HDF service versions. For example:

[root@host ~]# hdf-select status | grep 3.1.1.0-<build-number>
nifi - 3.1.1.0-<build-number>