Github user MLnick commented on the pull request:
https://github.com/apache/spark/pull/11812#issuecomment-199698551
Here is my test case - I can replicate the `Infinity` similarities on a
small test dataset. It only occurs when the num partitions and the num
iterations is very high. It uses the [Lee corpus from
Gensim](https://github.com/piskvorky/gensim/blob/develop/gensim/test/test_data/lee_background.cor).
```scala
test("test Infinity similarity with many iterations") {
val doc = sc.textFile("/tmp/lee/lee.txt").map(line => line.split("
").toSeq)
val model = new Word2Vec()
.setNumPartitions(40)
.setNumIterations(20)
.setSeed(42L)
.fit(doc)
val syms = model.findSynonyms("war", 5)
syms.foreach { sym =>
assert(!(sym._2.isInfinite || sym._2.isNaN))
}
}
```
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