dongjoon-hyun commented on a change in pull request #32727:
URL: https://github.com/apache/spark/pull/32727#discussion_r642953268
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File path:
core/src/main/scala/org/apache/spark/storage/BlockManagerMasterEndpoint.scala
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@@ -574,8 +574,9 @@ class BlockManagerMasterEndpoint(
if (blockId.isShuffle) {
blockId match {
case ShuffleIndexBlockId(shuffleId, mapId, _) =>
- // Don't update the map output on just the index block
Review comment:
To be safe, it seems that we should try **data** migration first always
and update on `index` file.
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