GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/20088
[SPARK-22905][ML][MLLIB][CORE] Fix ChiSqSelectorModel save implementation
## What changes were proposed in this pull request?
Currently, in `ChiSqSelectorModel`, save:
spark.createDataFrame(dataArray).repartition(1).write...
The default partition number used by createDataFrame is
"defaultParallelism",
Current RoundRobinPartitioning won't guarantee the "repartition" generating
the same order result with local array. We need fix it.
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark fix_chisq_model_save
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20088.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 #20088
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commit 5fd56c350cb410740209fba32c19489847a1d019
Author: WeichenXu <weichen.xu@...>
Date: 2017-12-27T04:31:25Z
init pr
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