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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/03/03 08:32:00 UTC
[jira] [Assigned] (SPARK-38401) Unify get preferred locations for shuffle in AQE
[ https://issues.apache.org/jira/browse/SPARK-38401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-38401:
------------------------------------
Assignee: Apache Spark
> 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
> Assignee: Apache Spark
> Priority: Major
>
> It has several issues with method `ShuffledRowRDD#getPreferredLocations`.
> * 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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