Github user jkbradley commented on the issue: https://github.com/apache/spark/pull/17014 Thanks all for discussing this! I'm just catching up now. I'm OK with adding handlePersistence as a new Param, but please do so in a separate PR and JIRA issue. I'd like to backport the KMeans fix since it's a bug causing a performance regression, but we should not backport the new Param API.
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