WeichenXu123 commented on a change in pull request #32399:
URL: https://github.com/apache/spark/pull/32399#discussion_r633177750
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File path:
mllib/src/main/scala/org/apache/spark/ml/tuning/TrainValidationSplit.scala
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@@ -161,11 +174,28 @@ class TrainValidationSplit @Since("1.5.0")
(@Since("1.5.0") override val uid: St
}
// Wait for all metrics to be calculated
- val metrics = metricFutures.map(ThreadUtils.awaitResult(_, Duration.Inf))
-
- // Unpersist training & validation set once all metrics have been produced
- trainingDataset.unpersist()
- validationDataset.unpersist()
+ val metrics = try {
+ metricFutures.map(ThreadUtils.awaitResult(_, Duration.Inf))
+ }
+ catch {
+ case e: Throwable =>
+ subTaskFailed = true
+ try {
+ Thread.sleep(1000)
+ val sparkContext = sparkSession.sparkContext
+ sparkContext.cancelJobGroup(tvsJobGroup)
+ } catch {
+ case _: Throwable => ()
Review comment:
I think this is a standard way representing return "Unit",
https://stackoverflow.com/questions/53415664/how-do-i-explicitly-return-unit
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