GitHub user dbtsai opened a pull request:
https://github.com/apache/spark/pull/10862
[SPARK-12908][ML] Add warning message for LogisticRegression for potential
converge issue
When all labels are the same, it's a dangerous ground for
LogisticRegression without intercept to converge. GLMNET doesn't support this
case, and will just exit. GLM can train, but will have a warning message saying
the algorithm doesn't converge.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dbtsai/spark add-tests
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10862.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #10862
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commit e68cc38134ca78d5e8425aad4b1b5fd36c781ccc
Author: DB Tsai <d...@netflix.com>
Date: 2016-01-21T06:58:36Z
add warning message
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