XiDuo You created SPARK-38401:
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Summary: Unify get preferred locations for shuffle in AQE
Key: SPARK-38401
URL: https://issues.apache.org/jira/browse/SPARK-38401
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.3.0
Reporter: XiDuo You
It has several issues in the method `getPreferredLocations` of `ShuffledRowRDD`.
* it does not respect the config `spark.shuffle.reduceLocality.enabled`, so we
can not disable it.
* it does not respect `REDUCER_PREF_LOCS_FRACTION`, so it has no effect if DAG
schedule task to an executor who has less data. In worse, driver will take more
memory to store the useless locations.
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