[GitHub] [spark] sunchao commented on a change in pull request #35613: [SPARK-38273][SQL] `decodeUnsafeRows`'s iterators should close underlying input streams

[GitBox <gi...@apache.org>]

sunchao commented on a change in pull request #35613:
URL: https://github.com/apache/spark/pull/35613#discussion_r812366848



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File path: sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
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@@ -384,17 +385,31 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
     val bis = new ByteArrayInputStream(bytes)
     val ins = new DataInputStream(codec.compressedInputStream(bis))
 
-    new Iterator[InternalRow] {
+    new NextIterator[InternalRow] {
+      Option(TaskContext.get()).foreach(_.addTaskCompletionListener[Unit](_ => closeIfNeeded()))
       private var sizeOfNextRow = ins.readInt()

Review comment:
       nit: should we also protect this with `try .. catch` and close the input when error happens?




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