Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19788#discussion_r169899114
--- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala ---
@@ -295,8 +307,8 @@ private[spark] abstract class MapOutputTracker(conf:
SparkConf) extends Logging
* and the second item is a sequence of (shuffle block id,
shuffle block size) tuples
* describing the shuffle blocks that are stored at that block
manager.
*/
- def getMapSizesByExecutorId(shuffleId: Int, startPartition: Int,
endPartition: Int)
- : Seq[(BlockManagerId, Seq[(BlockId, Long)])]
+ def getMapSizesByExecutorId(shuffleId: Int, startPartition: Int,
endPartition: Int,
+ serializer: Serializer = null): Seq[(BlockManagerId, Seq[(BlockId,
Long)])]
--- End diff --
if possible let's not introduce a default value here.
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