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https://issues.apache.org/jira/browse/HIVE-13840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Prasanth Jayachandran updated HIVE-13840:
-----------------------------------------
    Attachment: HIVE-13840.1.patch

[~owen.omalley] Can you please take a look? This fixes the perf regression. 

> Orc split generation is reading file footers twice
> --------------------------------------------------
>
>                 Key: HIVE-13840
>                 URL: https://issues.apache.org/jira/browse/HIVE-13840
>             Project: Hive
>          Issue Type: Bug
>          Components: ORC
>    Affects Versions: 2.1.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Critical
>         Attachments: HIVE-13840.1.patch
>
>
> Recent refactorings to move orc out introduced a regression in split 
> generation. This leads to reading the orc file footers twice during split 
> generation.



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