GitHub user Leemoonsoo opened a pull request:
https://github.com/apache/zeppelin/pull/2153
[ZEPPELIN-2282] NPE on NotebookServer.java when client send null ticket.
### What is this PR for?
When client (zeppelin-web) send message with null ticket, NotebookServer
does not handle and throw NPE.
### What type of PR is it?
Bug Fix
### Todos
* [x] - Null check
### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-2282
### 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/Leemoonsoo/zeppelin ZEPPELIN-2282
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/2153.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 #2153
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commit 1a05bed3ae161f5f57378c612769a38b13c52185
Author: Lee moon soo <m...@apache.org>
Date: 2017-03-17T21:44:14Z
prevent NPE
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