Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15894#discussion_r88551801
--- Diff:
core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala
---
@@ -171,14 +179,30 @@ final class ShuffleBlockFetcherIterator(
override def onBlockFetchSuccess(blockId: String, buf:
ManagedBuffer): Unit = {
// Only add the buffer to results queue if the iterator is not
zombie,
// i.e. cleanup() has not been called yet.
+ val in = try {
--- End diff --
note: move this out of callback to not block network pool
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