Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/15682
The warning message is valid. We might need to issue a better exception
here.
To resolve the root cause, we might need adding a new API for uncaching the
view in which a relevant table has been dropped? I am not confident how to do
it in a perfect way. Let me open a JIRA now and cc both of you in the
discussion.
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