Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/3636#issuecomment-96755432
I realized that, with convergence being measured based on the weight
vector, it does not make sense to measure relative to the initial weights
(since they could easily be specified as an all-zero or other arbitrary
vector). Instead, can you please measure relative to the L2 norm of the
previous weight vector?
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