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https://issues.apache.org/jira/browse/SPARK-36389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17391913#comment-17391913
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Apache Spark commented on SPARK-36389:
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User 'otterc' has created a pull request for this issue:
https://github.com/apache/spark/pull/33616
> Revert the change that accepts negative mapId in ShuffleBlockId
> ---------------------------------------------------------------
>
> Key: SPARK-36389
> URL: https://issues.apache.org/jira/browse/SPARK-36389
> Project: Spark
> Issue Type: Bug
> Components: Shuffle
> Affects Versions: 3.2.0
> Reporter: Chandni Singh
> Priority: Minor
>
> With SPARK-32922, we added a change that {{ShuffleBlockId}} can have a
> negative mapId. This was to support push-based shuffle where {{-1}} as mapId
> indicated a push-merged block. However with SPARK-32923, a different type of
> {{BlockId}} was introduced - {{ShuffleMergedId}}, but reverting the change to
> {{ShuffleBlockId}} was missed.
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