Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1472
@djKooks Thanks for kind reminder :)
Currently Zeppelin works with "zero-configuration" status. As you know,
even if users didn't activate `conf/zeppelin-env.sh.template` or
`conf/zeppelin-site.xml.template`, Zeppelin works with default configurations.
I think you missed this side. Can you test this patch without `zeppelin-env.sh`
and `zeppelin-site.xml` again?
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