Github user ehnalis commented on a diff in the pull request:
https://github.com/apache/spark/pull/6671#discussion_r32433381
--- Diff:
core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala ---
@@ -460,7 +460,9 @@ private[deploy] class SparkSubmitArguments(args:
Seq[String], env: Map[String, S
| on one of the worker machines
inside the cluster ("cluster")
| (Default: client).
| --class CLASS_NAME Your application's main class (for
Java / Scala apps).
- | --name NAME A name of your application.
+ | --name NAME A name of your application. In
yarn-cluster mode the name
--- End diff --
@vanzin `SparkConf.set("spark.app.name", "foo")` will not work in
cluster-mode applications, since this line of code will run when the AM ignites
the main user class. This setting will not take effect, since it will run on
YARN, while the client already set the application name during
application-submission. (And you are not able to change the app's name later on
with YARN.)
I suggest to explicitly emphasize this behavior and limitation at
`setAppName`, and I would encourage YARN users to use `spark-submit --name`
while deploying. Maybe we should deprecate `setAppName`, because it can take no
effect in cluster-mode.
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