Dear sonups3, I met the same issue, can you explain detailed what you did to fix? Thanks! ... View more

I think I figured this out.  In this case, I needed to use the other flavor of explode in the second operation:   val ydf = xdf.explode("nar", "gname") { nar: Seq[String] => nar }   Always happens, as soon as you ask the question publicly... ... View more