Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/9878#discussion_r45568460
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala ---
@@ -315,13 +315,15 @@ class Word2Vec extends Serializable with Logging {
val syn0Global =
Array.fill[Float](vocabSize * vectorSize)((initRandom.nextFloat() -
0.5f) / vectorSize)
val syn1Global = new Array[Float](vocabSize * vectorSize)
+ val bcSyn0Global = sc.broadcast(syn0Global)
--- End diff --
Broadcasting is a good idea, but these values are modified (based on
aggregated updates) on each iteration. You'll need to make a new broadcast
variable on each iteration.
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