Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1976
@del680202
>When I enable authentication with shiro or switch interpreter mode to Per
user & isolated, Restart does not work and it is possible to make zombie
process.
This issue has been solved by #2149. And the issue status was updated to
`RESOLVED` in https://issues.apache.org/jira/browse/ZEPPELIN-2037. Can you
check again?
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