cloud-fan commented on issue #25491: [SPARK-28699][Core] Disable using radix sort for ShuffleExchangeExec in repartition case URL: https://github.com/apache/spark/pull/25491#issuecomment-522520081 > Radix sort should only be selected if all sort fields can fit in the prefix Yes, but this check is missing in `ShuffleExchangeExec`, see https://github.com/apache/spark/pull/25491/files#diff-3ceee31a3da1b7c71dddd32f666126fbL245
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