Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/4188#issuecomment-73335694
Yeah, Yarn makes a mess out of this. Basically, it does this:
val args = List("abd", "def", "g h")
val cmd = args.mkString(" ")
So even though you have 3 arguments in `args`, the actual execution will
have 4 when interpreted by the shell. So the code in `ExecutorRunnable` works
because it just builds a big command line, instead of trying to parse that
command line into a proper argument list with `Utils.splitCommandString`.
Anyway, Yarn's API is broken but it is what it is, so we have to work with
it. It would be nice if both `Client` and `ExecutorRunnable` used the same
approach, for consistency, but not needed to fix this issue.
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