GitHub user yoonlee95 opened a pull request:

    https://github.com/apache/spark/pull/18897

    [SPARK-21655][YARN] Support Kill CLI for Yarn mode

    ## What changes were proposed in this pull request?
    Similar to how standalone and Mesos have the capability to safely shut down 
the spark application, there should be a way to safely shut down spark on Yarn 
mode. This will ensure a clean shutdown and unregistration from yarn.
    
    This PR adds YARN support for `--kill SUBMISSION_ID` CLI
    
    ## How was this patch tested?
    
    Tested by running a word count job and killing it via the kill CLI.
    
    - Test condition
        - Application running on Client mode, cluster mode
        - different ACL condition for the client that is submitting the kill CLI
               - no view, modify ACL
               - only view ACL
               - only modify ACL
               - both view, modify ACL
        - spark.authentication true/false
        - using keytab

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

    $ git pull https://github.com/yoonlee95/spark SPARK-21655

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

    https://github.com/apache/spark/pull/18897.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 #18897
    
----
commit 14c680c6635402c35e3bed4a249936f54bceee82
Author: John Lee <jl...@yahoo-inc.com>
Date:   2017-08-09T19:59:59Z

    patch applied with merge conflict fixed

commit af9d7e3b48e438c06ee6e948c65792aa59c95e4a
Author: John Lee <jl...@yahoo-inc.com>
Date:   2017-08-09T21:28:44Z

    tested cluster & client mode

----


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