Major Description
The spark Application Master starts its web UI at http://<host-name>:port.
When Spark ApplicationMaster registers its URL with Resource Manager , the URL does not contain URI scheme.
If the URL scheme is absent, Resource Manager’s web app proxy will use the HTTP Policy of the Resource Manager.(YARN-1553)
If the HTTP Policy of the Resource Manager is https, then web app proxy will try to access https://<host-name>:port.
This will result in error.
