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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