Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16785
@hvanhovell Yeah, I think so. As in previous comment, I don't find a way
now to improve `getAliasedConstraints` significantly by re-writing its logic
without parallel collection.
We may consider #16775 which is an another solution to fix this issue by
checkpointing datasets for pipelines of long stages.
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