Github user del680202 commented on the issue:
https://github.com/apache/zeppelin/pull/1976
@AhyoungRyu
I test #2149 in my machine.
It works well, Thanks.
But I seem when I edit&save interpreter config then the zombie process will
be occurred.
Anyway, ``Restart`` button looks well, I close this PR, thanks.
## Test cases:
### Global mode
Restart by button in notebook page: SUCCESS
Restart by button in interpreter page: SUCCESS
### Per user & isolated mode
Restart by button in notebook page: SUCCESS
Restart by button in interpreter page: SUCCESS
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