zhengruifeng commented on code in PR #47328:
URL: https://github.com/apache/spark/pull/47328#discussion_r1676763983
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mllib/src/main/scala/org/apache/spark/ml/r/AFTSurvivalRegressionWrapper.scala:
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@@ -129,7 +129,9 @@ private[r] object AFTSurvivalRegressionWrapper extends
MLReadable[AFTSurvivalReg
val rMetadata = ("class" -> instance.getClass.getName) ~
("features" -> instance.features.toImmutableArraySeq)
val rMetadataJson: String = compact(render(rMetadata))
- sc.parallelize(Seq(rMetadataJson), 1).saveAsTextFile(rMetadataPath)
+ sparkSession.createDataFrame(
+ Seq(Tuple1(rMetadataJson))
+ ).repartition(1).write.text(rMetadataPath)
Review Comment:
ah, I see, this `LocalTableScanExec` ganrantees single row -> single
partition.
It will be better if we can specify the `numPartitions` somewhere
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