attilapiros commented on issue #24499: [SPARK-27677][Core] Serve local disk persisted blocks by the external service after releasing executor by dynamic allocation URL: https://github.com/apache/spark/pull/24499#issuecomment-491910045 @squito > Nothing is going to delete the rdd files if you call unpersist after the original executor has already been removed. But was that already true before? Good catch. I also planed to go through the `unpersist` mechanism because of my other open PR (https://github.com/apache/spark/pull/24554). Yes, this is a change in the behaviour. And I think we should correct this discrepancy as it breaks the symmetry (for existing original executors the file is deleted). I am checking for possibilities (as I see a new `BlockTransferMessage` have to be introduced for a clean solution) I will come back to you with a commit targeting this problem in the next days.
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