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https://issues.apache.org/jira/browse/YARN-913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14142875#comment-14142875
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Vinod Kumar Vavilapalli commented on YARN-913:
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I started looking at this. I have done my fair share of reviews in my life, but
this is a monster patch. Can we please split this to have a realistic timeline
for commit to 2.6? I propose the following sub-tasks
- The addition of registry as a stand alone module. Which in itself is massive
and can be further split - server side abstraction, ZK based server side
implementation, client side, web-services etc.
- Integration of registry into YARN
- Changing YARN apps like distributed-shell
- Documentation
I just applied the massive patch against latest trunk and digging through it.
But if you agree, we should file sub-tasks and divide up the patch. Thanks.
> Add a way to register long-lived services in a YARN cluster
> -----------------------------------------------------------
>
> Key: YARN-913
> URL: https://issues.apache.org/jira/browse/YARN-913
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: api, resourcemanager
> Affects Versions: 2.5.0, 2.4.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: 2014-09-03_Proposed_YARN_Service_Registry.pdf,
> 2014-09-08_YARN_Service_Registry.pdf, RegistrationServiceDetails.txt,
> YARN-913-001.patch, YARN-913-002.patch, YARN-913-003.patch,
> YARN-913-003.patch, YARN-913-004.patch, YARN-913-006.patch,
> YARN-913-007.patch, YARN-913-008.patch, yarnregistry.pdf, yarnregistry.tla
>
>
> In a YARN cluster you can't predict where services will come up -or on what
> ports. The services need to work those things out as they come up and then
> publish them somewhere.
> Applications need to be able to find the service instance they are to bond to
> -and not any others in the cluster.
> Some kind of service registry -in the RM, in ZK, could do this. If the RM
> held the write access to the ZK nodes, it would be more secure than having
> apps register with ZK themselves.
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