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https://issues.apache.org/jira/browse/YARN-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14269556#comment-14269556
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Steve Loughran commented on YARN-2571:
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Xuan
1. If you can show me an example of an active service to start with, I'll
gladly make it active only
2. We're relying on operations to be idempotent: whoever creates last wins,
whoever deletes last wins. There's some race conditions on cleanup if there's a
change between a read and a delete, but that's what you get in a world without
transactions.
> RM to support YARN registry
> ----------------------------
>
> Key: YARN-2571
> URL: https://issues.apache.org/jira/browse/YARN-2571
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: YARN-2571-001.patch, YARN-2571-002.patch,
> YARN-2571-003.patch, YARN-2571-005.patch, YARN-2571-007.patch,
> YARN-2571-008.patch, YARN-2571-009.patch
>
>
> The RM needs to (optionally) integrate with the YARN registry:
> # startup: create the /services and /users paths with system ACLs (yarn, hdfs
> principals)
> # app-launch: create the user directory /users/$username with the relevant
> permissions (CRD) for them to create subnodes.
> # attempt, container, app completion: remove service records with the
> matching persistence and ID
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