GitHub user weand opened a pull request:
https://github.com/apache/zeppelin/pull/2806
[ZEPPELIN-3241] fix NPE when restarting Interpreter
### What is this PR for?
We often (but not always) face an NPE when restarting Spark interpreter.
Our Spark interpreter run in scoped mode per note. The restart then is not
possible, only restart of whole zeppelin daemon helps out.
This PR fixes this NPE.
### What type of PR is it?
Bug Fix
### Todos
### What is the Jira issue?
[https://issues.apache.org/jira/browse/ZEPPELIN-3241](https://issues.apache.org/jira/browse/ZEPPELIN-3241)
### How should this be tested?
- manual
### Screenshots (if appropriate)
### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? no
* Does this needs documentation? no
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/weand/zeppelin ZEPPELIN-3241
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/2806.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2806
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commit 85c04481011acede3e7292d2b260ddf28084cb61
Author: Andreas Weise <a.weise@...>
Date: 2018-02-16T21:45:59Z
ZEPPELIN-3241: NPE when restarting Interpreter
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