Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/12604#issuecomment-214562765
> OneVsRest with classifier in estimatorParamMaps of tuning fail to
persistence
Nice catch. Could you please create a JIRA and note this issue in the
Python docstring, with a link to the JIRA?
Your proposal might work, but it munges some ideas in OneVsRest and
validation together. I think we can devise a better long-term solution, but
it's not a critical issue since it's a pretty fancy use case for OneVsRest.
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