Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/19802
I think there are some values in having a better experience with mismatch
client/server versions. We discussed it might be even more common when the
client was a R package (or Python perhaps down the line) @shivaram
I agree though focusing on one particular line is likely not sufficient.
Perhaps we should design this out? Have this version check formally be part of
the protocol handshake?
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