[jira] [Resolved] (HIVE-23685) Removing user's extra resources while executing File Merge Task

["Krisztian Kasa (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-23685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krisztian Kasa resolved HIVE-23685.
-----------------------------------
    Resolution: Fixed

Pushed to master. Thank you [~Qiang.Kang]!

> Removing user's extra resources while executing File Merge Task
> ---------------------------------------------------------------
>
>                 Key: HIVE-23685
>                 URL: https://issues.apache.org/jira/browse/HIVE-23685
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer, Query Planning
>    Affects Versions: All Versions
>            Reporter: Qiang.Kang
>            Assignee: Qiang.Kang
>            Priority: Critical
>              Labels: pull-request-available
>         Attachments: HIVE-23685.02.patch, HIVE-23685.1.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Hi, we find that MapReduce's file merge map containers will download user's extra resources(such as: added jars, files, archives) before launching task. When these resources are large or the network is busy, file merge jobs will be timeout, causing the query be failed. As we all know, file merge task will run correctly just with hive-exec.jar and MapReduce framework. Therefore, there is no need to download user's resources. The patch below prevents setting `tmpjars` for FileMerge Task.



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