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https://issues.apache.org/jira/browse/YARN-6127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16137408#comment-16137408
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Subru Krishnan commented on YARN-6127:
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[~kasha], you raise a valid concern. We addressed this as part of YARN-6798, so
I'll try it to cherry-pick that back to branch-2 to make sure we don't break
rolling upgrades.
> Add support for work preserving NM restart when AMRMProxy is enabled
> --------------------------------------------------------------------
>
> Key: YARN-6127
> URL: https://issues.apache.org/jira/browse/YARN-6127
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: amrmproxy, nodemanager
> Reporter: Subru Krishnan
> Assignee: Botong Huang
> Fix For: 2.9.0, 3.0.0-alpha4
>
> Attachments: YARN-6127-branch-2.v1.patch, YARN-6127.v1.patch,
> YARN-6127.v2.patch, YARN-6127.v3.patch, YARN-6127.v4.patch
>
>
> YARN-1336 added the ability to restart NM without loosing any running
> containers. In a Federated YARN environment, there's additional state in the
> {{AMRMProxy}} to allow for spanning across multiple sub-clusters, so we need
> to enhance {{AMRMProxy}} to support work-preserving restart.
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