zwangsheng commented on code in PR #45415:
URL: https://github.com/apache/spark/pull/45415#discussion_r1517066704
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core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala:
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@@ -690,7 +690,7 @@ private[spark] class ExternalSorter[K, V, C](
* Write all the data added into this ExternalSorter into a map output
writer that pushes bytes
* to some arbitrary backing store. This is called by the SortShuffleWriter.
*
- * @return array of lengths, in bytes, of each partition of the file (used
by map output tracker)
+ * Update the partition's length, when call partition pair writer to close.
Review Comment:
OK
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