Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/11852#discussion_r56937697
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/optimization/LBFGS.scala ---
@@ -88,6 +91,8 @@ class LBFGS(private var gradient: Gradient, private var
updater: Updater)
* Set the maximal number of iterations for L-BFGS. Default 100.
*/
def setNumIterations(iters: Int): this.type = {
+ require(iters > 0, s"Maximum of iterations must be greater than 0," +
--- End diff --
In some cases, we might need `iters = 0` to test baseline models.
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