Github user rxin commented on the issue:
https://github.com/apache/spark/pull/16401
hm concrete suggestion:
1. pass the conf and cache the computed statistics the first time
2. have a simple invalidateStatsCache method that can be called manually to
invalidate.
Basically what I suggested in
https://github.com/apache/spark/pull/16401#issuecomment-270841604
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