Ngone51 commented on a change in pull request #32287:
URL: https://github.com/apache/spark/pull/32287#discussion_r627519995
##########
File path:
core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala
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@@ -245,9 +253,21 @@ final class ShuffleBlockFetcherIterator(
case FetchBlockInfo(blockId, size, mapIndex) => (blockId.toString,
(size, mapIndex))
}.toMap
val remainingBlocks = new HashSet[String]() ++= infoMap.keys
+ val deferredBlocks = new ArrayBuffer[String]()
val blockIds = req.blocks.map(_.blockId.toString)
val address = req.address
+ @inline def enqueueDeferredFetchRequestIfNecessary(): Unit = {
+ if (remainingBlocks.isEmpty && deferredBlocks.nonEmpty) {
+ val blocks = deferredBlocks.map { blockId =>
+ val (size, mapIndex) = infoMap(blockId)
+ FetchBlockInfo(BlockId(blockId), size, mapIndex)
+ }
+ results.put(DeferFetchRequestResult(FetchRequest(address,
blocks.toSeq)))
+ deferredBlocks.clear()
+ }
+ }
Review comment:
Filed the JIRA ticket: https://issues.apache.org/jira/browse/SPARK-35330
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