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https://issues.apache.org/jira/browse/TEZ-3605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kuhu Shukla updated TEZ-3605:
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    Attachment: TEZ-3605.012.patch

Fixing the numspill=0 case for DefaultSorter to honor sendPartitionDetails flag.

> Detect and prune empty partitions for the Ordered case
> ------------------------------------------------------
>
>                 Key: TEZ-3605
>                 URL: https://issues.apache.org/jira/browse/TEZ-3605
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Kuhu Shukla
>            Assignee: Kuhu Shukla
>         Attachments: TEZ-3605.001.patch, TEZ-3605.002.patch, 
> TEZ-3605.003.patch, TEZ-3605.004.patch, TEZ-3605.005.patch, 
> TEZ-3605.006.patch, TEZ-3605.007.patch, TEZ-3605.008.patch, 
> TEZ-3605.009.patch, TEZ-3605.010.patch, TEZ-3605.011.patch, TEZ-3605.012.patch
>
>
> Analogous to the Unordered case we should not have empty partition 
> entries/segments in the Ordered/DefaultSorter case. This will save writing 
> unnecessary data.
> Additionally, with tez_shuffle feature (TEZ-3334), in a heavily auto reduced 
> job, this change would allow not fetching empty partitions and then throwing 
> them away.



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