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https://issues.apache.org/jira/browse/YARN-8080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16469942#comment-16469942
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Suma Shivaprasad edited comment on YARN-8080 at 5/10/18 5:31 AM:
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Thanks [~billie.rinaldi] for reviewing the patch. Attached patch with the
review comments fixed. Havent made any changes in flex transition currently to
scale up/down according to the number of running containers instead of
component.getNumContainers and instead added documentation that flex is not
supported. this will be addressed by disabling it as part of YARN-8255
was (Author: suma.shivaprasad):
Thanks [~billie.rinaldi] for reviewing the patch. Attached patch with the
review comments fixed. Havent made any changes in flex transition currently to
scale up/down according to the number of running containers instead of
component.getNumContainers and instead added documentation that flex is not
supported. this will be addressed by disabling it as part of YARN-8080.
> YARN native service should support component restart policy
> -----------------------------------------------------------
>
> Key: YARN-8080
> URL: https://issues.apache.org/jira/browse/YARN-8080
> Project: Hadoop YARN
> Issue Type: Task
> Reporter: Wangda Tan
> Assignee: Suma Shivaprasad
> Priority: Critical
> Attachments: YARN-8080.001.patch, YARN-8080.002.patch,
> YARN-8080.003.patch, YARN-8080.005.patch, YARN-8080.006.patch,
> YARN-8080.007.patch, YARN-8080.009.patch
>
>
> Existing native service assumes the service is long running and never
> finishes. Containers will be restarted even if exit code == 0.
> To support boarder use cases, we need to allow restart policy of component
> specified by users. Propose to have following policies:
> 1) Always: containers always restarted by framework regardless of container
> exit status. This is existing/default behavior.
> 2) Never: Do not restart containers in any cases after container finishes: To
> support job-like workload (for example Tensorflow training job). If a task
> exit with code == 0, we should not restart the task. This can be used by
> services which is not restart/recovery-able.
> 3) On-failure: Similar to above, only restart task with exitcode != 0.
> Behaviors after component *instance* finalize (Succeeded or Failed when
> restart_policy != ALWAYS):
> 1) For single component, single instance: complete service.
> 2) For single component, multiple instance: other running instances from the
> same component won't be affected by the finalized component instance. Service
> will be terminated once all instances finalized.
> 3) For multiple components: Service will be terminated once all components
> finalized.
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