GitHub user ruseel opened a pull request:

    https://github.com/apache/zeppelin/pull/2565

    add zeppelin.livy.share_existing_session option

    If you want to share livy session, There is no option now.
    After this commit, setting zeppelin.livy.share_existing_session to true
    make LivyInterpreter use an existing livy session
    (first session returned by /sessions)
    
    ### What is this PR for?
    add zeppelin.livy.share_existing_session option. 
    zeppelin.livy.share_existing_session is true, list exsiting livy session 
and select first session. 
    by doing so, we can share livy session between zeppelin livy interpreters. 
    
    ### What type of PR is it?
    Feature
    
    ### Todos
    
    ### What is the Jira issue?
    
    ### How should this be tested?
    
    * setup livy server 
    * run zeppelin server
    * setup zeppelin livy interpreter(change 
zeppelin.livy.share_existing_session to true) 
    * make new note 
    * make another note 
    * audit logs/zeppelin-interpreter-*.log
    
    ### Screenshots (if appropriate)
    
    ### Questions:
    * Does the licenses files need update? No 
    * Is there breaking changes for older versions? No
    * Does this needs documentation? Yes


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

    $ git pull https://github.com/ruseel/zeppelin livy-share-existing-session

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

    https://github.com/apache/zeppelin/pull/2565.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 #2565
    
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commit 366fff1b6f7154a10467fdac22af3512e45a490e
Author: stephen <step...@vcnc.co.kr>
Date:   2017-09-04T10:16:28Z

    zeppelin.livy.share_existing_session
    
    If you want to share livy session, There is no option now.
    After this commit, setting zeppelin.livy.share_existing_session to true
    make LivyInterpreter use an existing livy session
    (first session returned by /sessions)

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