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From "Bikas Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4278) On AM registration, response should include cluster Nodes report on demanded by registration request.
Date Fri, 23 Oct 2015 11:18:27 GMT

    [ https://issues.apache.org/jira/browse/YARN-4278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970840#comment-14970840
] 

Bikas Saha commented on YARN-4278:
----------------------------------

Client can ask for it but IMO, no clients actually do. Hence we probably don't have enough
evidence to suggest that it might work in practice, specially at large deployments like Yahoo.

> On AM registration, response should  include cluster Nodes report on demanded by registration
request.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4278
>                 URL: https://issues.apache.org/jira/browse/YARN-4278
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: api
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>
> From the yarn-dev mailing list discussion thread [Thread-1|http://mail-archives.apache.org/mod_mbox/hadoop-yarn-dev/201510.mbox/%3C0EE80F6F7A98A64EBD18F2BE839C91156798AFB3@szxeml512-mbs.china.huawei.com%3E]
[Thread-2|http://mail-archives.apache.org/mod_mbox/hadoop-yarn-dev/201510.mbox/%3C4F7812FC-AB5D-465D-AC89-82473569817E@hortonworks.com%3E]

> Slider required to know about cluster nodes details for providing support for affinity/anti-affinity
on containers.
> Current behavior : During life span of application , updatedNodes are sent in allocate
request only if there are any change like added/removed/'state change' in the nodes. Otherwise
cluster nodes not updated to AM.
> One of the approach thought by [~stevel@apache.org] is while AM registration let response
hold the cluster nodes report



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