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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2571) RM to support YARN registry
Date Thu, 08 Jan 2015 16:58:36 GMT

    [ https://issues.apache.org/jira/browse/YARN-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14269556#comment-14269556
] 

Steve Loughran commented on YARN-2571:
--------------------------------------

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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