ViewFs is not supported on Hive clusters?

[#1]

Now I'm trying to use viewfs for NameNode Federation with HDP3.1.
I found "ViewFs is not supported on Hive clusters." on the following page.
https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/managing-and-monitoring-ambari/content/amb_...

Does it mean viewfs is not supported on Hive services?
(I can't get the meaning of "Hive clusters".)
Thank you for your any help 🙂

[#2]

One update. Hive seems to have an issue about handling "viewfs://"?

For example, hive db creation got failed with permission error even if the permission of the target hdfs dir is 777.

HDFS permission:

hdfs dfs -ls -d viewfs://fed/user/hadoop/warehouse/hadoop_viewfs6.db

drwxrwxrwx - hadoop hadoop 0 2019-04-24 07:44 viewfs://fed/user/hadoop/warehouse/hadoop_viewfs6.db

Hive DB creation got failed with the hdfs dir.

0: jdbc:hive2://XXXX > create database hadoop_viewfs6 location '/user/hadoop/warehouse/hadoop_viewfs6.db';

Error: Error while compiling statement: FAILED: HiveAccessControlException Permission denied: user [hadoop] does not have [WRITE] privilege on [viewfs://fed/user/hadoop/warehouse/hadoop_viewfs6.db] (state=42000,code=40000

Succeeded with "hdfs://"

0: jdbc:hive2://XXXX > create database hadoop_viewfs6 location 'hdfs://ns1/user/hadoop/warehouse/hadoop_viewfs6.db';