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

    https://github.com/apache/spark/pull/17658#discussion_r112154490
  
    --- Diff: 
core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala ---
    @@ -243,18 +243,19 @@ private[history] class FsHistoryProvider(conf: 
SparkConf, clock: Clock)
           applications.get(appId).flatMap { appInfo =>
             appInfo.attempts.find(_.attemptId == attemptId).flatMap { attempt 
=>
               val replayBus = new ReplayListenerBus()
    +          val fileStatus = fs.getFileStatus(new Path(logDir, 
attempt.logPath))
    +          val appListener = replay(fileStatus, 
isApplicationCompleted(fileStatus), replayBus)
    +
               val ui = {
                 val conf = this.conf.clone()
                 val appSecManager = new SecurityManager(conf)
    -            SparkUI.createHistoryUI(conf, replayBus, appSecManager, 
appInfo.name,
    -              HistoryServer.getAttemptURI(appId, attempt.attemptId), 
attempt.startTime)
    +            SparkUI.createHistoryUI(conf, replayBus, appSecManager,
    +              appListener.appSparkVersion.getOrElse(""), appInfo.name,
    +              HistoryServer.getAttemptURI(appId, attempt.attemptId),
    +              attempt.startTime)
                 // Do not call ui.bind() to avoid creating a new server for 
each application
               }
     
    -          val fileStatus = fs.getFileStatus(new Path(logDir, 
attempt.logPath))
    -
    -          val appListener = replay(fileStatus, 
isApplicationCompleted(fileStatus), replayBus)
    --- End diff --
    
    Is it correct to remove this two lines? As I know it is necessary because 
in the previous `replay` call we only parse `SparkListenerApplicationStart` and 
`SparkListenerApplicationEnd`.


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