GitHub user yu-iskw opened a pull request:
https://github.com/apache/spark/pull/11370
[SPARK-12874][ML] ML StringIndexer does not protect itself from column name
duplication
## What changes were proposed in this pull request?
ML StringIndexer does not protect itself from column name duplication.
We should still improve a way to validate a schema of `StringIndexer` and
`StringIndexerModel`. However, it would be great to fix at another issue.
## How was this patch tested?
unit test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yu-iskw/spark SPARK-12874
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11370.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 #11370
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commit 917851d3a3f554b0a0f93036da0205b8e24947f1
Author: Yu ISHIKAWA <yuu.ishik...@gmail.com>
Date: 2016-02-25T15:12:36Z
[SPARK-12874][ML] ML StringIndexer does not protect itself from column name
duplication
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