Github user yanboliang commented on the issue:
https://github.com/apache/spark/pull/15342
I'm more prefer to maintain the original logic that keep
```model.clusterCenters.length``` equal to ```k```. Was there some discussion
as to make this change?
I checked popular Python machine learning library scikit-learn, it return
the requested number of centroids:
And for R kmeans, it throw error if there is more cluster centers than
distinct data points:
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