[jira] [Created] (YARN-5292) Support for PAUSED state in a container

["Hitesh Sharma (JIRA)" <ji...@apache.org>]

Hitesh Sharma created YARN-5292:
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             Summary: Support for PAUSED state in a container
                 Key: YARN-5292
                 URL: https://issues.apache.org/jira/browse/YARN-5292
             Project: Hadoop YARN
          Issue Type: New Feature
            Reporter: Hitesh Sharma


JIRA 2877 introduced OPPORTUNISTIC containers, and JIRA 5216 adds 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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