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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-308) Improve documentation about what "asks" means in AMRMProtocol
Date Fri, 04 Jan 2013 19:08:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544113#comment-13544113
] 

Jason Lowe commented on YARN-308:
---------------------------------

bq. The AMRM protocol is not a delta protocol but an absolute one. So every ask request sends
all outstanding requests to the RM.

Are you sure?  AppSchedulingInfo.updateResourceRequests looks like it's treating it as a delta
protocol to me, as it is not clearing prior asks when a new ask arrives.
                
> Improve documentation about what "asks" means in AMRMProtocol
> -------------------------------------------------------------
>
>                 Key: YARN-308
>                 URL: https://issues.apache.org/jira/browse/YARN-308
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: api, resourcemanager
>    Affects Versions: 2.0.2-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>             Fix For: 2.0.3-alpha
>
>
> It's unclear to me from reading the javadoc exactly what "asks" means when the AM sends
a heartbeat to the RM.  Is the AM supposed to send a list of all resources that it is waiting
for?  Or just inform the RM about new ones that it wants?

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