zhengruifeng opened a new pull request #35247:
URL: https://github.com/apache/spark/pull/35247
### What changes were proposed in this pull request?
In `KMeansSuite` and `BisectingKMeansSuite`, there are some unused lines:
```
model1.clusterCenters.forall(Vectors.norm(_, 2) == 1.0
```
For cosine distance, the norm of centering vector should be 1, so the norm
checking is meaningful;
For euclidean distance, the norm checking is meaningless;
### Why are the changes needed?
to enable norm checking for cosine distance, and diable it for euclidean
distance
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
updated testsuites
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