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From "Subru Krishnan (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-4879) Enhance Allocate Protocol to Identify Requests Explicitly
Date Wed, 04 Oct 2017 01:26:02 GMT

     [ https://issues.apache.org/jira/browse/YARN-4879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Subru Krishnan resolved YARN-4879.
----------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 3.0.0-beta1
                   2.9.0

> Enhance Allocate Protocol to Identify Requests Explicitly
> ---------------------------------------------------------
>
>                 Key: YARN-4879
>                 URL: https://issues.apache.org/jira/browse/YARN-4879
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: applications, resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Subru Krishnan
>             Fix For: 2.9.0, 3.0.0-beta1
>
>         Attachments: SimpleAllocateProtocolProposal-v1.pdf, SimpleAllocateProtocolProposal-v2.pdf
>
>
> For legacy reasons, the current allocate protocol expects expanded requests which represent
the cumulative request for any change in resource constraints. This is not only very difficult
to comprehend but makes it impossible for the scheduler to associate container allocations
to the original requests. This problem is amplified by the fact that the expansion is managed
by the AMRMClient which makes it cumbersome for non-Java clients as they all have to replicate
the non-trivial logic. In this JIRA, we are proposing enhancement to the Allocate Protocol
to allow AMs to identify requests explicitly.  



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