Github user JoshRosen commented on the pull request:

    https://github.com/apache/spark/pull/3850#issuecomment-73395456
  
    @rxin I think folks have been holding off on merging branch 1.0 backports 
because the tests usually fail there, although in many cases I think that's 
because our test stability improvements haven't been backported to that branch, 
leaving those tests much more prone to spurious failures due to timing issues 
port contention, etc.
    
    Since the number of branch-1.0 backports is so small, we could just merge 
them in now as long as they compile and choose to fix up the tests later or run 
the tests in an environment with less contention (e.g. a dedicated EC2 node 
rather than AMPLab Jenkins).  This isn't an ideal situation, but I think it 
might be better than just closing these PRs or leaving them to clutter up the 
review queue.


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