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https://issues.apache.org/jira/browse/YARN-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266911#comment-14266911
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Xuan Gong commented on YARN-2571:
---------------------------------
Thanks for the patch. Overall looks fine.
1. Could we move the registry service from alway-on service to active services
? For example, if RM HA is enabled, only the active RM can start the registry
service.
2. The Curator Framework is used here to do the ZK operation. I am not familiar
with this. Does the curator framework provide automatic fence mechanism when we
write/delete related znodes? For example, only the active RM can write data in
znode. The standby RM should not be allowed to do anything.
> 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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