Github user mebelousov commented on the issue:
https://github.com/apache/zeppelin/pull/2716
1. As I see, if 'wait' is the last command in the 'interpreter.sh' then
'shutdown_hook' doesn't execute.
The add of dummy action such `sleep 0` after 'wait' allows to execute
'shutdown_hook' and remove pid file.
Now I don't understand such behaviour.
2. The 'eval' in line 222 generates the long process hierarcy.
It was added in [1]. I think we can remove it.
3. It's to be good to remove warnings by [2]
@woowahan-jaehoon, could you update PR?
Maybe better if I will create new PR.
[1]
https://github.com/apache/zeppelin/commit/d1fc86b7b2d2012c0323345166c98cc02886e9f1#diff-8d3bd42a5de342ebad38e1d113d9f75cR209
[2] https://www.shellcheck.net/
---
