Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/15051
@felixcheung
Now I update the scala-side wapper args type as following:
layers: Array[Int],
seed: String
and the seed default value currently I use "", not NULL, because the R-side
args serializer cannot handle `as.character(NULL)` object correctly.
another problem:
how to test R code which contains `stop` activity ? I want to test a piece
of R code to make sure it will call `stop` indeed.
thanks!
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