Github user andrewor14 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/5297#discussion_r27698365
  
    --- Diff: docs/running-on-yarn.md ---
    @@ -196,6 +196,15 @@ Most of the configs are the same for Spark on YARN as 
for other deployment modes
       It should be no larger than the global number of max attempts in the 
YARN configuration.
       </td>
     </tr>
    +<tr>
    +  <td><code>spark.yarn.submit.waitAppCompletion</code></td>
    --- End diff --
    
    Is the purpose of making this configurable to provide backward 
compatibility? I wonder if the new behavior should just be the default; I can't 
imagine someone actually going out of his/her way to set this to false 
explicitly. On the other hand people may rely on the existing behavior to 
detect when the application has finished. What do others think?


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