Github user mengxr commented on a diff in the pull request: https://github.com/apache/spark/pull/2595#discussion_r18297053 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/tree/impl/DTStatsAggregator.scala --- @@ -159,161 +166,15 @@ private[tree] abstract class DTStatsAggregator( * This method modifies this aggregator in-place. */ def merge(other: DTStatsAggregator): DTStatsAggregator = { - require(allStatsSize == other.allStatsSize, + require(statsSize == other.statsSize, s"DTStatsAggregator.merge requires that both aggregators have the same length stats vectors." - + s" This aggregator is of length $allStatsSize, but the other is ${other.allStatsSize}.") + + s" This aggregator is of length $statsSize, but the other is ${other.statsSize}.") var i = 0 // TODO: Test BLAS.axpy - while (i < allStatsSize) { + while (i < statsSize) { --- End diff -- `statsSize` -> `allStatsSize` (replace all in this function)
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