[jira] [Created] (YARN-6963) Prevent other containers from staring when a container is re-initializing

["Arun Suresh (JIRA)" <ji...@apache.org>]

Arun Suresh created YARN-6963:
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             Summary: Prevent other containers from staring when a container is re-initializing
                 Key: YARN-6963
                 URL: https://issues.apache.org/jira/browse/YARN-6963
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Arun Suresh
            Assignee: Arun Suresh


Further to discussions in YARN-6920.
Container re-initialization will lead to momentary relinquishing of NM resources when the container is brought down followed by re-claiming of the same resources when it is re-launched. If there are Opportunistic containers in the queue, it can lead to un-necessary churn if one of those opportunistic containers are started and immediately killed.
This JIRA tracks changes required to prevent the above by ensuring the resources for a container are 'locked' for the during of the container lifetime - including the time it takes for a re-initialization. 



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