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[SPARK-26714][CORE][WEBUI] Show 0 partition job in WebUI #23637

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deshanxiao wants to merge 9 commits into from
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[SPARK-26714][CORE][WEBUI] Show 0 partition job in WebUI #23637

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861db42
update
Jan 25, 2019
81f0340
update
Jan 27, 2019
5140145
update
Jan 27, 2019
1b04a2b
update
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e6ddecf
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Jan 28, 2019
2185cb8
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Jan 28, 2019
df719c5
update job default name
Jan 30, 2019
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5 changes: 5 additions & 0 deletions core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
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Expand Up @@ -692,7 +692,12 @@ private[spark] class DAGScheduler(
}

val jobId = nextJobId.getAndIncrement()
val startTime = clock.getTimeMillis()
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if (partitions.size == 0) {
listenerBus.post(
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SparkListenerJobStart(jobId, startTime, Seq[StageInfo](), properties))
listenerBus.post(
SparkListenerJobEnd(jobId, startTime, JobSucceeded))
// Return immediately if the job is running 0 tasks
return new JobWaiter[U](this, jobId, 0, resultHandler)
}
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3 changes: 2 additions & 1 deletion core/src/main/scala/org/apache/spark/ui/UIUtils.scala
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Expand Up @@ -363,7 +363,8 @@ private[spark] object UIUtils extends Logging {
skipped: Int,
reasonToNumKilled: Map[String, Int],
total: Int): Seq[Node] = {
val completeWidth = "width: %s%%".format((completed.toDouble/total)*100)
val ratio = if (total == 0) 100.0 else (completed.toDouble/total)*100
val completeWidth = "width: %s%%".format(ratio)
// started + completed can be > total when there are speculative tasks
val boundedStarted = math.min(started, total - completed)
val startWidth = "width: %s%%".format((boundedStarted.toDouble/total)*100)
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9 changes: 7 additions & 2 deletions core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
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Expand Up @@ -857,8 +857,13 @@ private[spark] object ApiHelper {
}

def lastStageNameAndDescription(store: AppStatusStore, job: JobData): (String, String) = {
val stage = store.asOption(store.stageAttempt(job.stageIds.max, 0)._1)
(stage.map(_.name).getOrElse(""), stage.flatMap(_.description).getOrElse(job.name))
// Some jobs have only 0 partitions.
if (job.stageIds.isEmpty) {
("", job.name)
} else {
val stage = store.asOption(store.stageAttempt(job.stageIds.max, 0)._1)
(stage.map(_.name).getOrElse(""), stage.flatMap(_.description).getOrElse(job.name))
}
}

}