[GitHub] zeppelin pull request #1749: [ZEPPELIN-1298] Address invalid ticket warnings...

[khalidhuseynov]

GitHub user khalidhuseynov opened a pull request:

    https://github.com/apache/zeppelin/pull/1749

    [ZEPPELIN-1298] Address invalid ticket warnings when server restarted

    ### What is this PR for?
    When Zeppelin server restarted then all previously open tab tickets will be 
invalidated. It causes execessive `PING` logs and requires user to refresh the 
page. More details in comments of the issue. 
    
    ### What type of PR is it?
    Bug Fix | Improvement
    
    ### Todos
    * [x] - remove ping warning
    * [x] - add popup
    
    ### What is the Jira issue?
    [ZEPPELIN-1298](https://issues.apache.org/jira/browse/ZEPPELIN-1298)
    
    ### How should this be tested?
    1. start Zeppelin server and login
    2. restart server
    3. try to do something in previously open window
    
    ### Screenshots (if appropriate)
    Before:
    
![ping_stack_before](https://cloud.githubusercontent.com/assets/1642088/21128483/b50a9400-c13e-11e6-84af-2384cdde7efc.gif)
    
    After:
    
![ping_stack_after](https://cloud.githubusercontent.com/assets/1642088/21128484/bd49f76e-c13e-11e6-86a6-f6ec944d927c.gif)
    
    
    ### 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/khalidhuseynov/incubator-zeppelin 
fix/invalidTicket

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

    https://github.com/apache/zeppelin/pull/1749.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 #1749
    
----
commit 4decb3b2f47acaa65a5329f8438f14b0219c3b53
Author: Khalid Huseynov <khalid...@gmail.com>
Date:   2016-12-13T05:06:47Z

    remote ping warn, add popup

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