The error that you see in the Ambari UI while adding the "" seems to be due to some other Inconsistency in the data.
The configuration changes could not be validated for consistency due to an unknown error. Your changes have not been saved yet. Would you like to proceed and save the changes?
Please check and share the complete Ambari Server.log after attempting to enabkle that property ./..
I am suspecting that the "Consistency Check Failure" might be some other inconsistency in your config.
Limit ls to few, I mean hdfs dfs -ls /tmp/hive/hive/14*
The directory under is of zero bytes
drwx------ - hive hdfs 0 2017-09-04 17:10 /tmp/hive/hive/149e8d6a-ad2a-433e-87be-6cb5b27e2b7b/_tmp_space.db
Find out older one and start purging them manually till you get a breather !!!.
After that get permission to implement Automatic approach