GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/13725
[SPARK-15892][ML] Backport correctly merging AFTAggregators to branch 1.6
## What changes were proposed in this pull request?
This PR backports https://github.com/apache/spark/pull/13619.
The original test added in branch-2.0 was failed in branch-1.6.
This seems because the behaviour was changed in
https://github.com/apache/spark/commit/101663f1ae222a919fc40510aa4f2bad22d1be6f.
This was failure while calculating Euler's number which ends up with a
infinity regardless of this path.
So, I brought the dataset from `AFTSurvivalRegressionExample` to make sure
this is working and then wrote the test.
I ran the test before/after creating empty partitions. `model.scale`
becomes `1.0` with empty partitions and becames `1.547` without them.
After this patch, this becomes always `1.547`.
## How was this patch tested?
Unit test in `AFTSurvivalRegressionSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-15892-1-6
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13725.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 #13725
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commit c42cc51e25bf8b88aac08bec3c1f636b5d1a8a3a
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-06-16T11:09:19Z
Backport correctly merging AFTAggregator to branch 1.6
commit b0203fcaeeb865bfe21bfff0475fa1be50c4f5ba
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-06-17T01:13:56Z
Update comments
commit 9cf8152c6121faa37a9cd337fddfa22f1457fc43
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-06-17T01:24:51Z
Fix coment
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