Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/18887
I have the same concern, as @squito said above
https://github.com/apache/spark/pull/18887#pullrequestreview-56700674.
Refactoring the old codes does not seem pointless to me.
To evaluate the impacts, I have a few questions:
- What is the migration proposal/guides?
- What is the proposal when users have multiple different Spark versions in
their production environment or migration procedure?
- How users should do when users hit a serious bug we are unable to find at
this stage?
- What are the external behavior changes between the new and the old ones?
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