Github user tengpeng commented on a diff in the pull request:
https://github.com/apache/spark/pull/19666#discussion_r175646335
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tree/impl/DecisionTreeMetadata.scala
---
@@ -152,15 +152,13 @@ private[spark] object DecisionTreeMetadata extends
Logging {
// TODO(SPARK-9957): Handle this properly by filtering out those
features.
if (numCategories > 1) {
// Decide if some categorical features should be treated as
unordered features,
--- End diff --
Change , to .
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