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

    https://github.com/apache/spark/pull/147#discussion_r10633644
  
    --- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala ---
    @@ -35,13 +35,21 @@ private[spark] case class 
GetMapOutputStatuses(shuffleId: Int)
       extends MapOutputTrackerMessage
     private[spark] case object StopMapOutputTracker extends 
MapOutputTrackerMessage
     
    -private[spark] class MapOutputTrackerMasterActor(tracker: 
MapOutputTrackerMaster)
    +private[spark] class MapOutputTrackerMasterActor(tracker: 
MapOutputTrackerMaster, conf: SparkConf)
       extends Actor with Logging {
    +  val maxAkkaFrameSize = conf.getInt("spark.akka.frameSize", 10) * 1024 * 
1024 // MB
    --- End diff --
    
    On this one a few suggestions:
    
    1. Have the code in `Executor.scala` do what you are doing here rather than 
access `akka.remote.netty.tcp.maximum-frame-size` directly (for consistency).
    2. Rather than hard code "10" here, create a companion object to 
`AkkaUtils` and give it a variable with the default frame size. That way we 
only have to change the constant 10 in one place if we decide to change it.
    
    /cc @kayousterhout


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