Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/21598 @markhamstra, Spark sometimes has some behaviour changes for some bug fixes or in few other cases so far. At least, see the similar configurations added in the migration guide. It sounded we are setting a hard limit here whether it's a bug or not. If the standards don't reflect the practice, it really should be discussed to be correct or complied. It is a matter of "from now on" to me since it sounds a bit different so far if I understood correctly.
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