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

    https://github.com/apache/spark/pull/19061#discussion_r135663076
  
    --- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala ---
    @@ -537,6 +537,11 @@ object SparkSubmit extends CommandLineUtils {
           }
         }
     
    +    // SPARK-21568 ConsoleProgressBar should be enabled only in shells
    --- End diff --
    
    I'm not a fan of comments like this. It's just repeating what the code is 
doing.
    
    Instead, can you change the command to mention that it's ok to do this 
because the user configuration is loaded later in this method and will override 
this value if set?


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