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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-2144) Add logs when preemption occurs
Date Mon, 16 Jun 2014 10:09:02 GMT

     [ https://issues.apache.org/jira/browse/YARN-2144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wangda Tan updated YARN-2144:
-----------------------------

    Attachment: YARN-2144.patch

I’ve attached a patch contains changes to show preemption information on RM app page and
RM log,

1) log style:
{code}
2014-06-16 10:45:22,247 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl:
Non-AM container preempted, appId=appattempt_1402886643897_0002_000001, containerId=container_1402886643897_0002_01_000004
{code}
{code}
2014-06-16 10:45:22,247 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl:
AM container preempted, appId=appattempt_1402886643897_0002_000001, containerId=container_1402886643897_0002_01_000001
{code}

2) Info in app page:
See <AM-page-preemption-info.jpg>

Not Included,
1) Persist preemption info across RM restart/HA.
2) FairScheduler related changes to show preemption info on RM app page is not covered in
this patch.

Any feedback is welcome!
Thanks

> 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
>
>
> 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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