Github user WangTaoTheTonic commented on the pull request:
https://github.com/apache/spark/pull/3607#issuecomment-66724192
@andrewor14
Ehh...You mean the `javaOpts += "-Xmx" + args.amMemory + "m"` in
`ClientBase.scala`?
If you mean so, the args is an ClientArguments object which we initialize
it in `Client.scala`, and it accepts args contains `--driver-memory` in cluster
mode while an SparkConf from System Props contains "spark.yarn.am.memory"
config in client mode.
In `ClientArguments.scala`, the amMemory will be assigned with
`--driver-memory` and replaced with `spark.yarn.am.memory` in client mode.
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