Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/5685#issuecomment-95991323
@srowen wondering, what do you mean by "local state"? The closure cleaner
only nulls out fields in _clones_ of local objects (actually the nulling
mechanism is really just that it creates a clone and then selectively copies
over certain fields from the original and neglects others). So I think it
should be fine.
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