Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/15120#discussion_r79895411
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -383,8 +383,9 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
logInfo("Spark configuration:\n" + _conf.toDebugString)
}
- // Set Spark driver host and port system properties
- _conf.setIfMissing("spark.driver.host", Utils.localHostName())
+ // Set Spark driver host and port system properties. This explicitly
sets the configuration
+ // instead of relying on the default value of the config constant.
+ _conf.set(DRIVER_HOST_ADDRESS, conf.get(DRIVER_HOST_ADDRESS))
--- End diff --
nit: could you use `_conf` instead? I thought `_conf` and `conf` were
different at first glance. But actually they are same.
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