Github user WangTaoTheTonic commented on the pull request:
https://github.com/apache/spark/pull/3557#issuecomment-69426504
@vanzin Which one do you mean? Client mode or Cluster mode?
@tgravescs I looked the name on RM's UI.
I checked SPARK-3678 and realized that if no `spark.app.name` in
configuration file or `--name` in command args, in cluster mode it will use
`mainClass`.
But in client mode, cause usually we use `SparkConf.setAppName` in
application code, so on RM's UI it will show what we set.
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