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https://issues.apache.org/jira/browse/YARN-1858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941320#comment-13941320
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Michael Lv commented on YARN-1858:
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The concept is similar to HTTP cookie, within each AM/App scope, resource
request can be tagged using the new field to get resources in groups when
resources are received/updated via RM/AM heartbeat.
> Allow containers can be allocated in groups
> -------------------------------------------
>
> Key: YARN-1858
> URL: https://issues.apache.org/jira/browse/YARN-1858
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Affects Versions: 2.3.0
> Reporter: Michael Lv
>
> Currently when applications running on YARN send resource request to RM to
> allocate resources, after the response is received, there is no good way to
> associate the results with the original request. We propose to add a field in
> each request to identify the resource request, so the resource received can
> be grouped to resource requests. This new field can be user managed and YARN
> only need to carry this field forward into the responses so user application
> can associate the received resources with the original request.
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