Github user hhbyyh commented on a diff in the pull request:
https://github.com/apache/spark/pull/9878#discussion_r45707914
--- 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 --
Hi Joseph, actually I found broadcast variable can somehow automatically
get updated...
an example
```
val arr = (0 to 16).toArray
val bc = sc.broadcast(arr)
val rdd = sc.parallelize(1 to 8)
for(w <- 1 to 10){
val result = rdd.map(i => bc.value(2)).collect().mkString(", ")
println(result)
arr(2) = new Random().nextInt()
}
```
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