Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/8180#discussion_r37678288
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -746,6 +848,63 @@ class DAGScheduler(
submitWaitingStages()
}
+ private[scheduler] def handleMapStageSubmitted(jobId: Int,
+ dependency: ShuffleDependency[_, _, _],
+ callSite: CallSite,
+ listener: JobListener,
+ properties: Properties) {
+ // Submitting this map stage might still require the creation of some
parent stages, so make
+ // sure that happens.
+ var finalStage: ShuffleMapStage = null
+ try {
+ // New stage creation may throw an exception if, for example, jobs
are run on a
+ // HadoopRDD whose underlying HDFS files have been deleted.
+ finalStage = getShuffleMapStage(dependency, jobId)
+ } catch {
+ case e: Exception =>
+ logWarning("Creating new stage failed due to exception - job: " +
jobId, e)
+ listener.jobFailed(e)
+ return
+ }
+ if (finalStage != null) {
--- End diff --
can you add a comment on how `finalStage` can be `null`? would be nice to
also have this in `handleJobSubmitted` as well, actually
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