Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/12474#issuecomment-217981329
I sort of like the idea of exposing the `ProcessBuilder`. While
particularly for the working directory we could add a setting, it's cleaner to
just use the java API; and for the streams, Java 7 has added some nice APIs
that would be more cumbersome to wrap around configs.
The thing that's missing from this PR is to add the same treatment for
`startApplication`. I'm a little wary of suggesting an overloaded method that
takes a `ProcessBuilder` argument (aside from the list of listeners), because
that means you could pass in any instance, not necessarily one that will start
a Spark application. But that's the easiest way to do it, and maybe the case
I'm thinking can be filed under "user error".
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