[GitHub] zeppelin pull request #2625: ZEPPELIN-2988. Zeppelin does not start new Livy...

[zjffdu]

GitHub user zjffdu opened a pull request:

    https://github.com/apache/zeppelin/pull/2625

    ZEPPELIN-2988. Zeppelin does not start new Livy session if yarn livy 
session application is killed

    ### What is this PR for?
    
    This PR will display a warning message when the livy session is dead. It 
won't restart it automatically, because livy session may be dead due to user 
code (like driver OOM). Restarting it automatically will hide the root cause 
and confuse users. 
    
    ### What type of PR is it?
    [Improvement]
    
    ### Todos
    * [ ] - Task
    
    ### What is the Jira issue?
    * https://issues.apache.org/jira/browse/ZEPPELIN-2988
    
    ### How should this be tested?
    * Manually tested
    
    ### Screenshots (if appropriate)
    
![image](https://user-images.githubusercontent.com/164491/31598273-4cac4afa-b212-11e7-8d82-7d870bd84c9b.png)
    
    ### Questions:
    * Does the licenses files need update?
    * Is there breaking changes for older versions?
    * Does this needs documentation?


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/zjffdu/zeppelin ZEPPELIN-2988

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zeppelin/pull/2625.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 #2625
    
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commit be5c7f32090d319419d9e2c89d67c2f9a0d1a243
Author: Jeff Zhang <zjf...@apache.org>
Date:   2017-10-13T05:50:00Z

    ZEPPELIN-2988. Zeppelin does not start new Livy session if yarn livy 
session application is killed

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