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

    https://github.com/apache/spark/pull/19616#discussion_r165516803
  
    --- Diff: 
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
 ---
    @@ -51,33 +52,16 @@ import org.apache.spark.util._
     /**
      * Common application master functionality for Spark on Yarn.
      */
    -private[spark] class ApplicationMaster(args: ApplicationMasterArguments) 
extends Logging {
    +private[spark] class ApplicationMaster(args: ApplicationMasterArguments, 
sparkConf: SparkConf,
    --- End diff --
    
    This doesn't follow Spark's convention for multi-line arguments.
    
    This also looks a little odd now, because there are conflicting arguments. 
`ApplicationMasterArguments` is now only used in cluster mode, and everything 
else is expected to be provided in the other parameters. So while this is the 
simpler change, it's also a little ugly.
    
    I don't really have a good suggestion right now, but it's something to 
think about.


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