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https://issues.apache.org/jira/browse/HIVE-23685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-23685 started by Qiang.Kang.
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> 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
> Reporter: Qiang.Kang
> Assignee: Qiang.Kang
> Priority: Critical
> Attachments: HIVE-23685.1.patch
>
>
> 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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