Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/1566
@khalidhuseynov I think `proxy-user` is the correct way to implement
impersonation for spark. Your approach in this PR only apply to driver side. If
you look at the RM UI, the yarn app owner is the still the origin user. The
reason that the owner of file is `user1` in your screenshot is that the hdfs
commit operation is invoked in driver side. And the change in hdfs-site.xml is
necessary for impersonation.
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