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Posted to issues@hive.apache.org by "Gunther Hagleitner (JIRA)" <ji...@apache.org> on 2016/08/02 22:32:20 UTC

[jira] [Commented] (HIVE-14403) LLAP node specific preemption will only preempt once on a node per AM

    [ https://issues.apache.org/jira/browse/HIVE-14403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404926#comment-15404926 ] 

Gunther Hagleitner commented on HIVE-14403:
-------------------------------------------

+1

> LLAP node specific preemption will only preempt once on a node per AM
> ---------------------------------------------------------------------
>
>                 Key: HIVE-14403
>                 URL: https://issues.apache.org/jira/browse/HIVE-14403
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>            Priority: Critical
>         Attachments: HIVE-14403.01.patch
>
>
> Query hang reported by [~cartershanklin]
> Turns out that once an AM has preempted a task on a node for locality, it will not be able to preempt another task on the same node (specifically for local requests)
> Manifests as a query hanging. It's possible for a previous query to interfere with a subsequent query since the AM is shared.



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