vanzin commented on issue #24142: [SPARK-27194][core] Job failures when task attempts do not clean up spark-staging parquet files URL: https://github.com/apache/spark/pull/24142#issuecomment-474977790 I don't think deleting the old file is a good idea. There might be edge cases where the failed task may still have the file opened and deleting from another place may not work as expected. (The name conflict also means that speculation is probably completely broken when this option is used. And speculation working would mean you have two files with the output of the same task, and only one of them should end up in the final output.)
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