Github user WeichenXu123 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18281#discussion_r128645326
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala ---
@@ -337,8 +353,13 @@ final class OneVsRest @Since("1.4.0") (
paramMap.put(classifier.labelCol -> labelColName)
paramMap.put(classifier.featuresCol -> getFeaturesCol)
paramMap.put(classifier.predictionCol -> getPredictionCol)
- classifier.fit(trainingDataset, paramMap)
- }.toArray[ClassificationModel[_, _]]
+ Future {
+ classifier.fit(trainingDataset, paramMap)
+ }(executionContext)
+ }
+ val models = modelFutures
+ .map(ThreadUtils.awaitResult(_,
Duration.Inf)).toArray[ClassificationModel[_, _]]
--- End diff --
@holdenk Because `ThreadUtils.awaitResult` wraps and re-throws any
exceptions thrown by the underlying `Await` call, ensuring that this thread's
stack trace appears in logs
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