[jira] [Assigned] (SPARK-23455) Default Params in ML should be saved separately

["Joseph K. Bradley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-23455?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph K. Bradley reassigned SPARK-23455:
-----------------------------------------

    Assignee: Liang-Chi Hsieh

> 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
>            Assignee: Liang-Chi Hsieh
>            Priority: Major
>
> 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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