Github user shivaram commented on the pull request:
https://github.com/apache/spark/pull/12836#issuecomment-216718443
Do `repartition` and `groupBy` have the same semantics in DataFrames ? My
mental model for `gapply` API is that we call groupBy the data frame and run
the UDF as the `agg` function on the group. Is that still what happens with
`dapply(repartition())` ?
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