Cloudera
Login to the Cloudera Manager UI
Click on the YARN service
Go to the Configuration tab
In the search bar, type the name of the property
Ambari
Login to the Ambari UI
For properties that start with "yarn." Click on the YARN service.
For properties that start with "mapreduce." Click on the MapReduce2 service.
Go to the Configs tab
In the search bar, type the name of the property
Mapr
Currently Mapr doesn't have a way to set or acquire properties from the UI
To get the properties, on the server, navigate to /opt/mapr/hadoop/hadoop-2.x.x/etc/hadoop/yarn-site.xml
Here you can search for the properties