Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/10838#discussion_r52345827
--- Diff:
core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala
---
@@ -143,9 +148,11 @@ final class ShuffleBlockFetcherIterator(
logDebug("Sending request for %d blocks (%s) from %s".format(
req.blocks.size, Utils.bytesToString(req.size),
req.address.hostPort))
bytesInFlight += req.size
+ reqsInFlight += 1
// so we can look up the size of each blockID
val sizeMap = req.blocks.map { case (blockId, size) =>
(blockId.toString, size) }.toMap
+ val remainingBlocks = new ArrayBuffer[String]() ++ sizeMap.keys
--- End diff --
nit: use HashSet instead of `ArrayBuffer`
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