Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/9523#issuecomment-154665578
Ahhh, very sorry I misunderstood this PR. Yes, it is my bad to ignore this
command line argument (`--num-executors`) which also can set executor number.
Looks like in `SparkSubmit`, it is already changed to
`spark.executor.instances`, so my bad there's another way which can set through
cmd line (which is inconsistent with `SparkSubmit`).
BTW @srowen , such way of invoking yarn client already has a warning.
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