Troubleshooting on YARN

General troubleshooting procedures to diagnose some of the commonly encountered issues in YARN.

The Kill application button does not display in the YARN UI

Problem statement
The YARN UI does not display the Kill application button.
Root cause
Kerberos is not enabled.
Enable Kerberos in order to view the Kill application button.
With the application state API, you can query the state of a submitted app as well as kill a running app by modifying the state of a running app using a PUT request with the state set to “KILLED”. To perform the PUT operation, authentication has to be set up for the Resource Manager (RM) web services. See Enabling Kerberos Authentication for CDP linked below.