Github user vanzin commented on the pull request: https://github.com/apache/spark/pull/5786#issuecomment-101439466 > but haven't we always generally needed to build Spark for Hadoop X to avoid this? Correct. But the default now claims to be 2.2, whereas the default build (i.e. the build where you do not enable any profiles) will not work on a hadoop-2.2 cluster.
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