cloud-fan commented on a change in pull request #33123:
URL: https://github.com/apache/spark/pull/33123#discussion_r660656779
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/ShufflePartitionsUtil.scala
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@@ -172,7 +172,7 @@ object ShufflePartitionsUtil extends Logging {
// coalesce any partitions after the end of last skew section.
if (numPartitions > start) {
val partitionSpecs = coalescePartitions(
- partitionIndices(start), partitionIndices.last + 1, validMetrics,
targetSize)
+ partitionIndices(start), partitionIndices.last + 1, validMetrics,
targetSize, true)
newPartitionSpecsSeq.zip(partitionSpecs).foreach(spec => spec._1 ++=
spec._2)
}
Review comment:
How do we make sure we return at least one partition spec if there is no
skew partition spec?
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