Github user jaceklaskowski commented on a diff in the pull request: https://github.com/apache/spark/pull/13329#discussion_r64900321 --- Diff: yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnScheduler.scala --- @@ -31,9 +31,8 @@ private[spark] class YarnScheduler(sc: SparkContext) extends TaskSchedulerImpl(s Logger.getLogger(classOf[RackResolver]).setLevel(Level.WARN) } - // By default, rack is unknown override def getRackForHost(hostPort: String): Option[String] = { - val host = Utils.parseHostPort(hostPort)._1 + val (host, _) = Utils.parseHostPort(hostPort) --- End diff -- It is when you agree that you could easily (?) miss `_1` at the very end. I do agree and I did miss it few times while reviewing that piece of code. Opinions may vary and I can happily revert this change if requested (I need your advice to learn your coding style).
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