Github user berngp commented on the pull request:
https://github.com/apache/spark/pull/507#issuecomment-41333015
Since in the Hadoop ecosystem the projects don't shade Protobufs nor Thrift
versions trying to work with every single combination with the versions is a
hassle to say the least. This is one of the things that Bigtop solves by
defining static versions that work together. I am not giving an answer but just
additional feedback of the complexity of trying to provide a tool that will
work with _all_ versions of the projects in the Hadoop ecosystem.
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