GitHub user sethah opened a pull request:
https://github.com/apache/spark/pull/15364
[SPARK-17792][ML] L-BFGS solver for linear regression does not accept
general numeric label column types
## What changes were proposed in this pull request?
Before, we computed `instances` in LinearRegression in two spots, even
though they did the same thing. One of them did not cast the label column to
`DoubleType`. This patch consolidates the computation and always casts the to
`DoubleType`.
## How was this patch tested?
Added a unit test to check all solvers. This test failed before this patch.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sethah/spark linreg_numeric_type
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15364.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 #15364
----
commit c1cdf63b0d26b2048bc40767e6a59b98e604fa99
Author: sethah <[email protected]>
Date: 2016-10-05T23:14:40Z
fix numeric type bug
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