huaxingao commented on a change in pull request #28487:
URL: https://github.com/apache/spark/pull/28487#discussion_r422558046
##########
File path:
mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
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@@ -261,4 +261,14 @@ class VectorAssemblerSuite
val output = vectorAssembler.transform(dfWithNullsAndNaNs)
assert(output.select("a").limit(1).collect().head == Row(Vectors.sparse(0,
Seq.empty)))
}
+ test("SPARK-31671: should give explicit error message when can not infer
column lengths") {
Review comment:
super nit: add a blank line between L263 and L264?
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