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https://issues.apache.org/jira/browse/YARN-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118228#comment-14118228
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Steve Loughran commented on YARN-2487:
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link to YARN-624; gang scheduling problem
> Need to support timeout of AM When no containers are assigned to it for a
> defined period
> ----------------------------------------------------------------------------------------
>
> Key: YARN-2487
> URL: https://issues.apache.org/jira/browse/YARN-2487
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Naganarasimha G R
> Assignee: Naganarasimha G R
>
> There are some scenarios where AM will not get containers and indefinitely
> waiting. We faced one such sceanrio which makes the applications to get hung
> :
> Consider a cluster setup which has 2 NMS of each 8GB resource,
> And 2 applications(MR2) are launched in the default queue where in each AM is
> taking 2 GB each.
> Each AM is placed in each of the NM. Now each AM is requesting for container
> of 7Gb mem resource .
> As in each NM only 6GB resource is available both the applications are hung
> forever.
> To avoid such scenarios i would like to propose
> generic timeout feature for all AM's in yarn, such that if no containers are
> assigned for an application for a defined period than yarn can timeout the
> application attempt.
> Default can be set to 0 where in RM will not timeout the app attempt and user
> can set his own timeout when he submits the application
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