Github user FireArrow commented on the issue:
https://github.com/apache/zeppelin/pull/1985
Sorry for the late comment.
This solution wouldn't work with impersonation, as the zeppelin user
wouldn't have permission to interrupt another users process (unless zeppelin
run as root, which comes with a whole set of other problems). I suggest you
read in the impersonation command, if there is one, and use that to send of the
`kill -SIGINT <pid>`.
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