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https://issues.apache.org/jira/browse/YARN-9608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862826#comment-16862826
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Zhankun Tang commented on YARN-9608:
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[~abmodi], Yeah. Thanks for the explanation! +1 from me. I can help to commit
this if no one opposes.
> DecommissioningNodesWatcher should get lists of running applications on node
> from RMNode.
> -----------------------------------------------------------------------------------------
>
> Key: YARN-9608
> URL: https://issues.apache.org/jira/browse/YARN-9608
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Abhishek Modi
> Assignee: Abhishek Modi
> Priority: Major
> Attachments: YARN-9608.001.patch, YARN-9608.002.patch
>
>
> At present, DecommissioningNodesWatcher tracks list of running applications
> and triggers decommission of nodes when all the applications that ran on the
> node completes. This Jira proposes to solve following problem:
> # DecommissioningNodesWatcher skips tracking application containers on a
> particular node before the node is in DECOMMISSIONING state. It only tracks
> containers once the node is in DECOMMISSIONING state. This can lead to
> shuffle data loss of apps whose containers ran on this node before it was
> moved to decommissioning state.
> # It is keeping track of running apps. We can leverage this directly from
> RMNode.
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