Github user ScrapCodes commented on a diff in the pull request:
https://github.com/apache/spark/pull/17357#discussion_r134986472
--- Diff:
core/src/main/scala/org/apache/spark/deploy/worker/DriverWrapper.scala ---
@@ -38,8 +39,10 @@ object DriverWrapper {
*/
case workerUrl :: userJar :: mainClass :: extraArgs =>
val conf = new SparkConf()
- val rpcEnv = RpcEnv.create("Driver",
- Utils.localHostName(), 0, conf, new SecurityManager(conf))
+ val host: String = Utils.localHostName()
--- End diff --
Please correct me, AFAIU `spark.driver.host` may not be specified on each
node of the cluster and its value might be global(i.e. cluster wide). Since
driver is launched on a random node during a failover, it's value can not be
pre-assigned and has to be picked up from that node's local environment.
About `spark.driver.port`, I am not sure, but the fact is - it might work,
even if it is global cluster wide constant.
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