Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/4216#issuecomment-71982680
Hey so in case it's not clear, the issue is that because Akka makes no
guarantees whatsoever about compatibility, we need to define our own protocol
if we want the standalone cluster manager to be able to accept submissions from
different versions. YARN already has this property by virtue of the fact that
the YARN API is stable.
In terms of reediness for 1.3 - of course it depends on getting enough
support to feel that we can merge this. Since this adds a new additive API (it
doesn't change the existing akka-based submission) that can be well tested in
isolation, it doesn't seem crazy to me to add it. But of course it depends on
getting sign off and making sure it's in good shape.
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