Github user squito commented on the issue: https://github.com/apache/spark/pull/19343 I don't see much point in putting this in the docs ... it seems too fine-grained a detail to be useful there. I just don't see the users who encounter this exception from going to look at the spot in the docs to figure out exactly what is wrong. I put an example exception in the JIRA, so at least users can find it with a search. Sounds like you feel pretty strongly we should close this as "won't fix"? I'd still prefer to have this in, but will settle for just having the workaround be easily searchable
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