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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2144) Add logs when preemption occurs
Date Mon, 16 Jun 2014 23:41:02 GMT

    [ https://issues.apache.org/jira/browse/YARN-2144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033190#comment-14033190
] 

Jian He commented on YARN-2144:
-------------------------------

Haven't looked at the patch. YARN-1809 is adding the attempt UI, Maybe the app UI should show
the total preempted containers info, and attempt UI should show each attempt's preempted containers
info ?

> Add logs when preemption occurs
> -------------------------------
>
>                 Key: YARN-2144
>                 URL: https://issues.apache.org/jira/browse/YARN-2144
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>    Affects Versions: 2.5.0
>            Reporter: Tassapol Athiapinya
>            Assignee: Wangda Tan
>         Attachments: AM-page-preemption-info.png, YARN-2144.patch, YARN-2144.patch, YARN-2144.patch
>
>
> There should be easy-to-read logs when preemption does occur. 
> 1. For debugging purpose, RM should log this.
> 2. For administrative purpose, RM webpage should have a page to show recent preemption
events.
> RM logs should have following properties:
> * Logs are retrievable when an application is still running and often flushed.
> * Can distinguish between AM container preemption and task container preemption with
container ID shown.
> * Should be INFO level log.



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