Github user shivaram commented on the issue:
https://github.com/apache/spark/pull/16668
@felixcheung Why dont we do something simpler where we call the scala
function from R side. i.e. get a handle to the scala DF, call `.rdd ` on it to
get a handle to the scala RDD etc. ? That seems less expensive than running the
conversion to RRDD and it doesn't involve scala side changes.
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