Github user HyukjinKwon commented on the pull request: https://github.com/apache/spark/pull/12629#issuecomment-214975784 It looks Hadoop configuration can be set via `option()` now. It looks when it sets `null` for Hadoop configurations, it uses default values which is consistent with what this PR proposes. So, I think we don't need a special handling for Hadoop configuration.
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