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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