Github user shahidki31 commented on the issue:
https://github.com/apache/spark/pull/23088
Thank you @srowen for the review. I will update the PR.
> When did the behavior change? you said you found the commit.
https://issues.apache.org/jira/browse/SPARK-20657 After the PR correspond
to the JIRA, this behavior change occurred. Also, In the PR discussion hasn't
mentioned whether it is intentional or not.
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