Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/6394#discussion_r34835128
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -872,6 +872,25 @@ class DAGScheduler(
// will be posted, which should always come after a corresponding
SparkListenerStageSubmitted
// event.
stage.latestInfo = StageInfo.fromStage(stage,
Some(partitionsToCompute.size))
+ val taskIdToLocations = try {
+ stage match {
+ case s: ShuffleMapStage =>
+ partitionsToCompute.map { id => (id, getPreferredLocs(stage.rdd,
id))}.toMap
+ case s: ResultStage =>
+ val job = s.resultOfJob.get
+ partitionsToCompute.map { id =>
+ val p = job.partitions(id)
+ (id, getPreferredLocs(stage.rdd, p))
+ }.toMap
+ }
+ } catch {
+ case NonFatal(e) =>
+ abortStage(stage, s"Task creation failed:
$e\n${e.getStackTraceString}")
+ runningStages -= stage
+ return
+ }
+ stage.latestInfo.taskLocalityPreferences =
Some(taskIdToLocations.values.toSeq)
--- End diff --
I wouldn't expect developers to be creating StageInfos, only reading them,
so I don't think changing the developer API in this way is a big concern.
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