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https://issues.apache.org/jira/browse/YARN-8012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuqi Wang updated YARN-8012:
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Attachment: YARN-8012 - Unmanaged Container Cleanup.pdf
> Support Unmanaged Container Cleanup
> -----------------------------------
>
> Key: YARN-8012
> URL: https://issues.apache.org/jira/browse/YARN-8012
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: nodemanager
> Affects Versions: 2.7.1
> Reporter: Yuqi Wang
> Assignee: Yuqi Wang
> Priority: Major
> Fix For: 2.7.1
>
> Attachments: YARN-8012 - Unmanaged Container Cleanup.pdf,
> YARN-8012-branch-2.7.1.001.patch
>
>
> An *unmanaged container / leaked container* is a container which is no longer
> managed by NM. Thus, it is cannot be managed / leaked by YARN, too.
> *There are many cases a YARN managed container can become unmanaged, such as:*
> * NM service is disabled or removed on the node.
> * NM is unable to start up again on the node, such as depended
> configuration, or resources cannot be ready.
> * NM local leveldb store is corrupted or lost, such as bad disk sectors.
> * NM has bugs, such as wrongly mark live container as complete.
> Note, they are caused or things become worse if work-preserving NM restart
> enabled, see YARN-1336
> *Bad impacts of unmanaged container, such as:*
> # Resource cannot be managed for YARN on the node:
> ** Cause YARN on the node resource leak
> ** Cannot kill the container to release YARN resource on the node to free up
> resource for other urgent computations on the node.
> # Container and App killing is not eventually consistent for App user:
> ** App which has bugs can still produce bad impacts to outside even if the
> App is killed for a long time
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