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https://issues.apache.org/jira/browse/SPARK-44109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-44109.
-----------------------------------
Fix Version/s: 3.5.0
Resolution: Fixed
Issue resolved by pull request 41676
[https://github.com/apache/spark/pull/41676]
> Remove duplicate preferred locations of each RDD partition
> ----------------------------------------------------------
>
> Key: SPARK-44109
> URL: https://issues.apache.org/jira/browse/SPARK-44109
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.5.0
> Reporter: Wan Kun
> Assignee: Wan Kun
> Priority: Major
> Fix For: 3.5.0
>
>
> DAGScheduler will get the preferred locations for each RDD partition and try
> to allocate the task on the preferred locations.
> We can remove the duplicate preferred locations to save memory.
> For example. reduce 0 needs to fetch map0 output and map1 output in host-A,
> then the preferred locations can be Array("host-A").
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