Github user JoshRosen commented on a diff in the pull request: https://github.com/apache/spark/pull/21346#discussion_r191964329 --- Diff: project/MimaExcludes.scala --- @@ -36,6 +36,9 @@ object MimaExcludes { // Exclude rules for 2.4.x lazy val v24excludes = v23excludes ++ Seq( + // [SPARK-6237][NETWORK] Network-layer changes to allow stream upload + ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.network.netty.NettyBlockRpcServer.receive"), --- End diff -- I suspect that it's because we might want to access these across Java package boundaries and Java doesn't have the equivalent of Scala's nested package scoped `private[package]`.
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