Github user akopich commented on a diff in the pull request: https://github.com/apache/spark/pull/18924#discussion_r140031900 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala --- @@ -462,31 +462,46 @@ final class OnlineLDAOptimizer extends LDAOptimizer { val expElogbetaBc = batch.sparkContext.broadcast(expElogbeta) val alpha = this.alpha.asBreeze val gammaShape = this.gammaShape + val optimizeDocConcentration = this.optimizeDocConcentration + val logphatPartOptionBase = () => if (optimizeDocConcentration) Some(BDV.zeros[Double](k)) --- End diff -- OK.
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