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

    https://github.com/apache/spark/pull/718#discussion_r13571516
  
    --- Diff: 
core/src/main/scala/org/apache/spark/deploy/history/HistoryServer.scala ---
    @@ -290,8 +212,81 @@ object HistoryServer {
         }
       }
     
    +  private def parse(args: List[String]): Unit = {
    +    args match {
    +      case ("--dir" | "-d") :: value :: tail =>
    +        set("fs.logDirectory",  value)
    +        parse(tail)
    +
    +      case ("-D") :: opt :: value :: tail =>
    --- End diff --
    
    Ok, I'll remove this new command line handling and revert to the old one.
    
    I find having to use SPARK_HISTORY_OPTS and other environment variables to 
pass argument to processes kinda hacky, but that can be changed separately.


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