Github user berngp commented on the pull request:
https://github.com/apache/spark/pull/355#issuecomment-40301034
@pwendell Mesos 0.16.0 uses protobufs 2.4.1 while Mesos 0.17.0 and above
upgraded to 2.5.0. On the other hand Hadoop 1.4 uses protobufs 2.4.1 while
Hadoop 2.2+ upgraded to 2.5.0. We could have a conditional Mesos version that
used 0.16.0 when using Hadoop < 2.x and Mesos 0.17.0 when using Hadoop >= 2.x.
This doesn't address the fact that Mesos is externalizing the Protobuf version
to client libraries which is always very tricky.
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