tomsisso commented on code in PR #49190:
URL: https://github.com/apache/spark/pull/49190#discussion_r1886272879
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sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala:
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@@ -519,6 +519,7 @@ case class ScalaAggregator[IN, BUF, OUT](
def withNewInputAggBufferOffset(newInputAggBufferOffset: Int):
ScalaAggregator[IN, BUF, OUT] =
copy(inputAggBufferOffset = newInputAggBufferOffset)
+ @transient
private[this] lazy val inputProjection = UnsafeProjection.create(children)
Review Comment:
As far as i get it it's not being accessed in the driver.
This field is accessed and initialized in the executor, as part of
ScalaAggregator#update, and then causes the failure when trying to return a
serialized TaskResult to the driver (which holds the mentioned accumulator).
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