Troubleshooting for mixed resource allocation mode in YARN Queue Manager

You can reset YARN Queue Manager UI and restore its functionality to troubleshoot YARN Queue Manager UI behavior in mixed resource allocation mode from Cloudera Manager.

In Cloudera Manager, select the YARN service.
Go to the Configuration tab.
If the flag is not set or the property is missing, mixed resource allocation mode will not be enabled in YARN. Set the following property yarn.scheduler.capacity.legacy-queue-mode.enabled value to ‘true’ in the Capacity Scheduler Configuration Advanced Configuration Snippet (Safety Valve) field to use the mixed allocation mode:
```
<property> 
<name>yarn.scheduler.capacity.legacy-queue-mode.enabled</name>
<value>false</value> 
</property>
```
Click Save Changes.
Click Actions > Restart to restart YARN.
Click Actions > Restart to restart YARN Queue Manager.