Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/12209#issuecomment-206506455
I looked at the KCL dependencies, and 1.4.0 already depended on protobuf
1.6.1. What was the error you got -- clearly a version mismatch problem? just
checking that it now becomes unavoidable but somehow worked before.
Yes, it might be viable to explicitly depend on protobuf 1.6.1 only in the
KCL assembly. Add a version and un-mark it as provided and add a comment. That
could be interesting to try. Although there's a risk of conflict in theory, it
sounds like it at least fixes a real problem in practice now.
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