Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/20327#discussion_r171379388
--- Diff:
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
---
@@ -79,6 +80,19 @@ private[spark] class ApplicationMaster(args:
ApplicationMasterArguments) extends
private val yarnConf = new
YarnConfiguration(SparkHadoopUtil.newConfiguration(sparkConf))
+ if (isClusterMode) {
+ // this logic replicates the way YARN NM determines the address to
bind listeners to
--- End diff --
This explain what it does, but it should be explaining why it does it.
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