Github user xaoc3dgraph commented on the pull request:
https://github.com/apache/spark/pull/8195#issuecomment-133569776
I might be wrong but I think centrality calculation produce wrong results.
Example graph:
```
Vertices: A, B, C, D, E, F
Edges: (A, B), (A, C), (A, D), (A, E), (A, F)
```
Calculation result is:
```
C closeness_centrality: 0.0
B closeness_centrality: 0.0
E closeness_centrality: 0.0
A closeness_centrality: 1.2
F closeness_centrality: 0.0
D closeness_centrality: 0.0
```
result of A closeness_centrality should be 1.0
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