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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-branch-2.7.1.001.patch
> 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-branch-2.7.1.001.patch
>
>
> An *unmanaged container* is a container which is no longer managed by NM.
> Thus, it is cannot be managed by YARN, too.
> *There are many cases a YARN managed container can become unmanaged, such as:*
> # For container resource managed by YARN, such as container job object
> and disk data:
> ** 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.
> # For container resource unmanaged by YARN:
> ** User breakaway processes from container job object.
> ** User creates VMs from container job object.
> ** User acquires other resource on the machine which is unmanaged by
> YARN, such as produce data outside Container folder.
> *Bad impacts of unmanaged container, such as:*
> # Resource cannot be managed for YARN and the node:
> ** Cause YARN and node resource leak
> ** Cannot kill the container to release YARN resource on the node
> # Container and App killing is not eventually consistent for user:
> ** App which has bugs can still produce bad impacts to outside even if the
> App is killed for a long time
> *Initial patch for review:*
> For the initial patch, the unmanaged container cleanup feature on Windows,
> only can cleanup the container job object of the unmanaged container. Cleanup
> for more container resources will be supported. And the UT will be added if
> the design is agreed.
> The current container will be considered as unmanaged when:
> # NM is dead:
> ** Failed to check whether container is managed by NM within timeout.
> # NM is alive but container is
> org.apache.hadoop.yarn.api.records.ContainerState#COMPLETE
> or not found:
> ** The container is
> org.apache.hadoop.yarn.api.records.ContainerState#COMPLETE or
> not found in the NM container list.
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