Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/5060#discussion_r29040627
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -94,6 +94,11 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
// contains a map from hostname to a list of input format splits on the
host.
private[spark] var preferredNodeLocationData: Map[String,
Set[SplitInfo]] = Map()
+ // This is used for Spark Streaming to check whether driver host and
port are set by user,
+ // if these two configurations are set by user, so the recovery
mechanism should not remove this.
+ private[spark] val isDriverHostSetByUser =
config.contains("spark.driver.host")
--- End diff --
It doesn't seem worth tacking on yet more little fields in `SparkContext`
just for a niche use case in a submodule. Use the config object in `Checkpoint`.
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