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https://issues.apache.org/jira/browse/HIVE-23685?focusedWorklogId=504414&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-504414
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ASF GitHub Bot logged work on HIVE-23685:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Oct/20 06:33
Start Date: 24/Oct/20 06:33
Worklog Time Spent: 10m
Work Description: tkanng opened a new pull request #1608:
URL: https://github.com/apache/hive/pull/1608
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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Remove `tmpjars` for `MergeFileTask`.
### Why are the changes needed?
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For queries with some large jars, it's unnecessary for `MergeFileTask` to
download extra resources and when the network is not good, containers might be
time-out.
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
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It has been tested in our product env.
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Issue Time Tracking
-------------------
Worklog Id: (was: 504414)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> 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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