Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18487#discussion_r125888006
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -321,6 +321,16 @@ package object config {
.intConf
.createWithDefault(3)
+ private[spark] val REDUCER_MAX_BLOCKS_IN_FLIGHT_PER_ADDRESS =
+ ConfigBuilder("spark.reducer.maxBlocksInFlightPerAddress")
--- End diff --
I'm not sure if it's a good idea to do this at reducer side, because there
may be a lot of reducers fetching data from one shuffle service at the same
time, and you wouldn't know that at reducer side. cc @jinxing64
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