srowen commented on a change in pull request #29482:
URL: https://github.com/apache/spark/pull/29482#discussion_r474101722
##########
File path:
mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
##########
@@ -241,7 +241,9 @@ class CountVectorizer @Since("1.5.0") (@Since("1.5.0")
override val uid: String)
}
wordCounts.unpersist()
- require(vocab.length > 0, "The vocabulary size should be > 0. Lower minDF
as necessary.")
+ if (vocab.isEmpty) {
+ this.logWarning("The vocabulary size is empty. Alter minDF/maxDF as
necessary.")
Review comment:
Minor, but it's `minTF` (it was wrong before). Also we could suggest
lowering minTF, or increasing maxDF, more specifically.
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