Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/12230#issuecomment-207569777
@yanboliang Thanks, I'll take a look. One initial comment: I don't think
we need to modify numTrees for GBTs. We can just stick with using maxIter. I
think it makes sense to separate maxIter and numTrees for GBTs since it will be
possible for numTrees < maxIter once we add training with a validation set for
early stopping.
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