Github user yinxusen commented on the pull request:
https://github.com/apache/spark/pull/10772#issuecomment-172147443
@jkbradley @davies I know why we get error here. If the element of a
`JavaArray` is primitive type, then we can use `list(JavaArray)`. However, if
its elements have complex structures, like `List(model.weights,
model.intercept).map(_.asInstanceOf[Object]).asJava` in the failed test, then
we cannot simply call `list(JavaArray)`, because it cannot convert its inner
elements automatically.
I'll change the fix into my original one.
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