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https://issues.apache.org/jira/browse/FLINK-32825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17752673#comment-17752673
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Weijie Guo commented on FLINK-32825:
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This will also cause the numBytesIn and numBytesOut of the identity map to be
unequal, and each record will differ by 8B (timestamp type is long).
!screenshot-1.png!
> SortingDataInput may introduce unnecessary timestamps for record
> ----------------------------------------------------------------
>
> Key: FLINK-32825
> URL: https://issues.apache.org/jira/browse/FLINK-32825
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Task
> Reporter: Weijie Guo
> Assignee: Weijie Guo
> Priority: Major
> Attachments: screenshot-1.png
>
>
> SortingDataInput will always attach timestamp for record during
> deserialization, even though the sorted data without timestamps before.
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