Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/9117#discussion_r43668740
--- Diff: core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala ---
@@ -122,6 +123,24 @@ private[ui] class StagePage(parent: StagesTab) extends
WebUIPage("stage") {
val externalAccumulables = allAccumulables.values.filter { acc =>
!acc.internal }
val hasAccumulators = externalAccumulables.size > 0
+ val tasksLocality = new mutable.HashMap[String, Long]
+ if (stageData.taskData.size > 0) {
+ for ((key, value) <- stageData.taskData) {
+ val locality = value.taskInfo.taskLocality.toString;
+ if (tasksLocality.contains(locality)) {
+ val count: Long = tasksLocality.get(locality).get + 1;
+ tasksLocality.put(locality, count);
+ } else {
+ tasksLocality.put(locality, 1);
+ }
+ }
+ }
+ var localityLevels: String = "";
--- End diff --
How about re-writing this as: (all of the concat statements are tough to
read)
tasksLocality.map { _ match {
case (localityLevel, count) =>
s"$localityLevel ($count)"
}}.mkString("; ")
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