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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-884) AM expiry interval should be set to smaller of {am, nm}.liveness-monitor.expiry-interval-ms
Date Tue, 25 Jun 2013 07:01:24 GMT

    [ https://issues.apache.org/jira/browse/YARN-884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13692797#comment-13692797
] 

Devaraj K commented on YARN-884:
--------------------------------

we can suggest the user to configure the am expiry interval to be less than the nm expiry
interval through the description/documentation and also potential problem they could face
if they don't configure, instead of taking the min of two configurations(i.e yarn.nm.liveness-monitor.expiry-interval-ms
& yarn.am.liveness-monitor.expiry-interval-ms) for one config(i.e yarn.am.liveness-monitor.expiry-interval-ms).

Also we can change the default values accordingly i.e AM_EXPIRY < NM_EXPIRY.
                
> AM expiry interval should be set to smaller of {am, nm}.liveness-monitor.expiry-interval-ms
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-884
>                 URL: https://issues.apache.org/jira/browse/YARN-884
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.0.4-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>              Labels: configuration
>         Attachments: yarn-884-1.patch
>
>
> As the AM can't outlive the NM on which it is running, it is a good idea to disallow
setting the am.liveness-monitor.expiry-interval-ms to a value higher than nm.liveness-monitor.expiry-interval-ms

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