sunchao commented on a change in pull request #33910:
URL: https://github.com/apache/spark/pull/33910#discussion_r702365729
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/AQEShuffleReadExec.scala
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@@ -82,8 +82,11 @@ case class AQEShuffleReadExec private(
// `RoundRobinPartitioning` but we don't need to retain the number of
partitions.
case r: RoundRobinPartitioning =>
r.copy(numPartitions = partitionSpecs.length)
- case other => throw new IllegalStateException(
- "Unexpected partitioning for coalesced shuffle read: " + other)
+ case _ =>
+ // Spark plugins may have custom partitioning and may replace this
operator
+ // during the postStageOptimization phase, so return
UnknownPartitioning here
+ // rather than throw an exception
+ UnknownPartitioning(partitionSpecs.length)
Review comment:
What if `child.outputPartitioning` is some other pre-defined
partitioning such as `SinglePartitioning`? seems we should still throw
exception?
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