ajithme commented on a change in pull request #24762: [SPARK-27907][SQL]
HiveUDAF with 0 rows throw NPE when try to serialize
URL: https://github.com/apache/spark/pull/24762#discussion_r289523376
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File path: sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
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@@ -474,7 +474,10 @@ private[hive] case class HiveUDAFFunction(
override def serialize(buffer: HiveUDAFBuffer): Array[Byte] = {
// Serializes an `AggregationBuffer` that holds partial aggregation
results so that we can
// shuffle it for global aggregation later.
- aggBufferSerDe.serialize(buffer.buf)
+ aggBufferSerDe.serialize(Option(buffer) match {
Review comment:
Done
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