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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2495) Allow admin specify labels from each NM (Distributed configuration)
Date Thu, 12 Mar 2015 05:12:39 GMT

    [ https://issues.apache.org/jira/browse/YARN-2495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14358109#comment-14358109
] 

Wangda Tan commented on YARN-2495:
----------------------------------

Hi [~Naganarasimha],
For areNodeLabelsSetInReq, one appoarch to avoid it is, you can add a PB structure (like NodeLabelsProto,
could placed in yarn_protos.proto, like NodeIdToLabelsProto), which contains {{repeated string
nodeLabels}}. It will be a part of RegisterProto and HeartbeatProto, and it could be null.
"Null" means not set, agree?

Regarding the invalid node label issue of registration/hearbeating, bring down the whole cluster
when label is invalid is a serious problem as mentioned by Craig, maybe you can:
If label(s) of a node being reporting is invalid, we can
- Show/log diagnostic in RM (nodes) page and NM page, saying label is invalid. (Need modify
web UI, can be done in a separated task)
- Make the node's labels to be empty, so that applications can continue use it.

Thanks,



> Allow admin specify labels from each NM (Distributed configuration)
> -------------------------------------------------------------------
>
>                 Key: YARN-2495
>                 URL: https://issues.apache.org/jira/browse/YARN-2495
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Naganarasimha G R
>         Attachments: YARN-2495.20141023-1.patch, YARN-2495.20141024-1.patch, YARN-2495.20141030-1.patch,
YARN-2495.20141031-1.patch, YARN-2495.20141119-1.patch, YARN-2495.20141126-1.patch, YARN-2495.20141204-1.patch,
YARN-2495.20141208-1.patch, YARN-2495.20150305-1.patch, YARN-2495.20150309-1.patch, YARN-2495_20141022.1.patch
>
>
> Target of this JIRA is to allow admin specify labels in each NM, this covers
> - User can set labels in each NM (by setting yarn-site.xml (YARN-2923) or using script
suggested by [~aw] (YARN-2729) )
> - NM will send labels to RM via ResourceTracker API
> - RM will set labels in NodeLabelManager when NM register/update labels



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