Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/16576
At the end, I think current checkpoint behavior is strange, and our
customers is very easy to use it in wrong way. For now the core logic is hard
to modify, but at least we should add useful warning, otherwise many spark
developers may be confused why sometimes checkpoint fail, OR their application
re-compute the RDDs but they don't realize it.
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