cloud-fan commented on a change in pull request #24892: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/24892#discussion_r296983519
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File path: core/src/main/scala/org/apache/spark/network/BlockDataManager.scala
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@@ -32,6 +32,12 @@ trait BlockDataManager {
*/
def getBlockData(blockId: BlockId): ManagedBuffer
+ /**
+ * Interface to get shuffle block data. Throws an exception if the block
cannot be found or
+ * cannot be read successfully.
+ */
+ def getShuffleBlockData(blockId: BlockId, shuffleGenerationId: Int):
ManagedBuffer
Review comment:
BTW, can we just define it as `def getShuffleBlockData(shuffleId: Int,
shuffleGenerationId: Int, mapId: Int, reducerId: Int)`?
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