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https://issues.apache.org/jira/browse/YARN-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15628792#comment-15628792
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Steve Loughran commented on YARN-2882:
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I think I've already expressed my unhappiness about breaking tagged-as-stable
stable classes/APIs and how "it wasn't meant to be subclassed for mock testing"
isn't the kind of response I'd like to have seen.
+1 for the patch, also +1 for making this policy "if we add new methods to a
public class, we'll make them non-abstract but fail as unsupported for the
benefit of those subclasses (especially mock test ones) which may exist.
> Add an OPPORTUNISTIC ExecutionType
> ----------------------------------
>
> Key: YARN-2882
> URL: https://issues.apache.org/jira/browse/YARN-2882
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Reporter: Konstantinos Karanasos
> Assignee: Konstantinos Karanasos
> Fix For: 2.9.0, 3.0.0-alpha1
>
> Attachments: YARN-2882-yarn-2877.001.patch,
> YARN-2882-yarn-2877.002.patch, YARN-2882-yarn-2877.003.patch,
> YARN-2882-yarn-2877.004.patch, YARN-2882.005.patch, yarn-2882.patch
>
>
> This JIRA introduces the notion of container types.
> We propose two initial types of containers: guaranteed-start and queueable
> containers.
> Guaranteed-start are the existing containers, which are allocated by the
> central RM and are instantaneously started, once allocated.
> Queueable is a new type of container, which allows containers to be queued in
> the NM, thus their execution may be arbitrarily delayed.
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