Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7064#discussion_r33419075
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala ---
@@ -134,8 +146,10 @@ final class EMLDAOptimizer extends LDAOptimizer {
verticesTMP.reduceByKey(_ + _)
}
+ // vertices are non empty docs and empty docs
+ val docAllTermVertices = docTermVertices union emptyDocTermVertices
--- End diff --
I'm not 100% sure this is a hard style rule, but best to avoid this syntax
and write `a.union(b)`. It generates a compiler warning otherwise IIRC.
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