Github user markhamstra commented on the pull request:
https://github.com/apache/spark/pull/940#issuecomment-44914945
Neither does spark 1.0.0.
We've offered no guarantee that any spark 1.x will work with scala 2.11.
If it turns out that we can't cross-compile for scala 2.10 and 2.11 with
essentially the same source code and dependencies and preserving our intention
to preserve binary compatibility, then that may be the occasion that forces the
beginning of spark 2.0 development.
In any event, the breaking of our intent to preserve binary compatibility
is no small matter and shouldn't slip into a PR without considerable
discussion. I'm not certain that that is what is happening with this PR, but I
do think that it is critical that we understand how strong our checks for
binary compatibility are and what are the bounds on dependency upgrades that we
can make while preserving that compatibility.
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