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https://issues.apache.org/jira/browse/YARN-5292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348806#comment-15348806
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Hitesh Sharma commented on YARN-5292:
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[~jianhe], the container would be resumed when the running containers finish on
the node and resources are available.
The main scenario here is for work preservation. If the container supports
preemption via pause/freeze then it can be put in this hibernate mode and
resumed when resources free up. For some applications it is quite expensive to
throw away the work done by an opportunistic container and thus want to have
the capability to preserve it.
Thanks for the feedback.
> Support for PAUSED container state
> ----------------------------------
>
> Key: YARN-5292
> URL: https://issues.apache.org/jira/browse/YARN-5292
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Hitesh Sharma
>
> YARN-2877 introduced OPPORTUNISTIC containers, and YARN-5216 proposes to add
> capability to customize how OPPORTUNISTIC containers get preempted.
> In this JIRA we propose introducing a PAUSED container state.
> When a running container gets preempted, it enters the PAUSED state, where it
> remains until resources get freed up on the node then the preempted container
> can resume to the running state.
>
> One scenario where this capability is useful is work preservation. How
> preemption is done, and whether the container supports it, is implementation
> specific.
> For instance, if the container is a virtual machine, then preempt would pause
> the VM and resume would restore it back to the running state.
> If the container doesn't support preemption, then preempt would default to
> killing the container.
>
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