Github user mebelousov commented on the issue:
https://github.com/apache/zeppelin/pull/2716
I find that pid files are not deleted.
I restarted python interpreter by 3 ways: inside note, in interpreter page
and restart application.
The number of interpreter pid files only grows.
It's not critical, by after a while "run" folder will contain a thousand of
irrelevant files.
Who can fix?---
