Liang-Chi Hsieh created SPARK-23455:
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Summary: Default Params in ML should be saved separately
Key: SPARK-23455
URL: https://issues.apache.org/jira/browse/SPARK-23455
Project: Spark
Issue Type: Improvement
Components: ML
Affects Versions: 2.4.0
Reporter: Liang-Chi Hsieh
We save ML's user-supplied params and default params as one entity in JSON.
During loading the saved models, we set all the loaded params into created ML
model instances as user-supplied params.
It causes some problems, e.g., if we strictly disallow some params to be set at
the same time, a default param can fail the param check because it is treated
as user-supplied param after loading.
The loaded default params should not be set as user-supplied params. We should
save ML default params separately in JSON.
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