Github user hayssams commented on the issue:
https://github.com/apache/zeppelin/pull/2333
Hello @jongyoul
OK got it.
However keep in mind that Webhdfs works in a kerberized env without any
change to the source code. It simply needs to be executed in a JAAS context
which is nothing else than a jaas.conf file passed as a parameter to the
Zeppelin JVM
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