Error 403 Reported When You Access the Native YARN Web UI from a Third-Party Platform

Symptom

When you access the native YARN web UI from a third-party platform, the system returns the following error message.

Cause Analysis

The native YARN Web UI blocks redirect requests originating from outside the cluster. To disable this behavior, modify the cas.enable.referer.check parameter.

Solution

1. Log in to FusionInsight Manager, choose Cluster > Services > Yarn, and click Configurations and then All Configurations. In the navigation pane on the left, choose ResourceManager > Customization. Add cas.enable.referer.check to the resourcemanager.core-site.customized.configs parameter and set its value to false. Then, save the settings.
2. Click the Instances tab, select the standby ResourceManager, and choose More > Restart Instance to restart the instance as prompted.
3. Click the Dashboard tab, choose More > Perform ResourceManager Switchover in the upper right corner of the page, and perform the switchover as prompted.
4. Click the Instances tab, select the standby ResourceManager, and choose More > Restart Instance to restart the instance as prompted.