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https://issues.apache.org/jira/browse/SPARK-14924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-14924.
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Resolution: Incomplete
> Tuning estimatorParamMaps with OneVsRest.classifier fails during persistence
> ----------------------------------------------------------------------------
>
> Key: SPARK-14924
> URL: https://issues.apache.org/jira/browse/SPARK-14924
> Project: Spark
> Issue Type: Bug
> Components: ML, PySpark
> Reporter: Xusen Yin
> Priority: Major
> Labels: bulk-closed
>
> {code}
> ovr = OneVsRest()
> epms = [{ovr.classifier: xxxx}, {ovr.classifier: xxx}]
> cv = CrossValidator(estimator=ovr, estimatorParamMaps=epms, ...)
> cv.load()
> {code}
> fails because classifier cannot be serialized via JSON.
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