Github user prabhjyotsingh commented on the issue:
https://github.com/apache/zeppelin/pull/1322
Agreed @echarles, the `doAs` part will be a problem, until
[ZEPPELIN-1340](https://issues.apache.org/jira/browse/ZEPPELIN-1340) is
resolved. Until then for security we may have to run half interpreter with
"User Impersonate" enable from UI (for example shell, python interpreter), and
for others use the standard `doAs` already implemented (like livy, spark, jdbc)
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