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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/03/10 09:46:00 UTC

[jira] [Updated] (HIVE-24866) FileNotFoundException during alter table concat

     [ https://issues.apache.org/jira/browse/HIVE-24866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HIVE-24866:
----------------------------------
    Labels: pull-request-available  (was: )

> FileNotFoundException during alter table concat
> -----------------------------------------------
>
>                 Key: HIVE-24866
>                 URL: https://issues.apache.org/jira/browse/HIVE-24866
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.4.0, 3.2.0, 4.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Because of the way combinefile IF groups files based on node and rack locality, there are cases where single big orc file gets spread across 2 or more combine hive split. When first task completes, as part of jobCloseOp the source orc file of concatenation is moved/renamed which can lead to FileNotFoundException in subsequent mappers that has partial split of that file. 
> A simple fix would be for the mapper with start of the split to own the entire orc file for concatenation. If a mapper gets partial split which is not the start then it can skip the entire file. 



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