This sbt issue seems to explain this: it would be the result of trying to get a test dependency if the same version were allowed from the Maven public repository.
A workaround would be to use git SHA versions or SNAPSHOT to not final build this test dependency, but we won’t know more if we don’t get an idea of how you got into a bad ivy state. / p>
TL DR: try clearing the cache of spark artifacts before building.
Edit: this is fixed in sbt 0.13.10-RC1 https://github.com/sbt/sbt/pull/2345 Update
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