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https://issues.apache.org/jira/browse/SPARK-23989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441980#comment-16441980
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liuxian commented on SPARK-23989:
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{color:#9876aa}I think '{color:#333333}SortShuffleWriter{color}' should adapt
to any shufflewrite scene{color}
> When using `SortShuffleWriter`, the data will be overwritten
> ------------------------------------------------------------
>
> Key: SPARK-23989
> URL: https://issues.apache.org/jira/browse/SPARK-23989
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: liuxian
> Priority: Critical
> Attachments: 无标题2.png
>
>
> {color:#333333}When using `SortShuffleWriter`, we only insert
> '{color}{color:#cc7832}AnyRef{color}{color:#333333}' into
> '{color}PartitionedAppendOnlyMap{color:#333333}' or
> '{color}PartitionedPairBuffer{color:#333333}'.{color}
> {color:#333333}For this function:{color}
> {color:#cc7832}override def {color}{color:#ffc66d}write{color}(records:
> {color:#4e807d}Iterator{color}[Product2[{color:#4e807d}K{color}{color:#cc7832},
> {color}{color:#4e807d}V{color}]])
> the value of 'records' is `UnsafeRow`, so the value will be overwritten
> {color:#333333} {color}
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