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https://issues.apache.org/jira/browse/SPARK-41469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852555#comment-17852555
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Yeachan Park commented on SPARK-41469:
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Maybe a stupid question, but I thought the whole point of shuffle migration was
that it doesn't have to be re-computed. Was nothing being done being done with
the migrated shuffle blocks prior to this PR?
> Task rerun on decommissioned executor can be avoided if shuffle data has
> migrated
> ---------------------------------------------------------------------------------
>
> Key: SPARK-41469
> URL: https://issues.apache.org/jira/browse/SPARK-41469
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.1.3, 3.2.2, 3.3.1
> Reporter: wuyi
> Assignee: wuyi
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> Currently, we will always rerun a finished shuffle map task if it once runs
> the lost executor. However, in the case of the executor loss is caused by
> decommission, the shuffle data might be migrated so that task doesn't need to
> rerun.
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