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https://issues.apache.org/jira/browse/HIVE-17426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173889#comment-16173889
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Daniel Dai commented on HIVE-17426:
-----------------------------------

It sounds like there will be no parallel task run with explain/repldump no 
matter the value of canExecuteInParallel(). Then we don't need to make them 
standout. We only need to disable fetch/ddl for now until it is fixed.

> Execution framework in hive to run tasks in parallel
> ----------------------------------------------------
>
>                 Key: HIVE-17426
>                 URL: https://issues.apache.org/jira/browse/HIVE-17426
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 3.0.0
>            Reporter: anishek
>            Assignee: anishek
>             Fix For: 3.0.0
>
>         Attachments: HIVE-17426.0.patch, HIVE-17426.1.patch, 
> HIVE-17426.2.patch, HIVE-17426.3.patch, HIVE-17426.4.patch, HIVE-17426.5.patch
>
>
> the execution framework currently only runs MR / Spark  Tasks in parallel 
> when {{set hive.exec.parallel=true}}.
> Allow other types of tasks to run in parallel as well to support replication 
> scenarios in hive. 



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