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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1366) AM should implement Resync with the ApplicationMasterService instead of shutting down
Date Sun, 06 Jul 2014 19:22:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-1366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053200#comment-14053200
] 

Jian He commented on YARN-1366:
-------------------------------

Can you also clarify why AMRMClient automatically does re-register ?
"ask list" is an internal object which may not be obvious for outside users. how about "container
requests"?
{code}
 then the re-register may end up sending the entire ask list
to the RM (including matched requests). 
{code}

Looks good to me overall, [~bikassaha], any more comments? 

> AM should implement Resync with the ApplicationMasterService instead of shutting down
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-1366
>                 URL: https://issues.apache.org/jira/browse/YARN-1366
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Bikas Saha
>            Assignee: Rohith
>         Attachments: YARN-1366.1.patch, YARN-1366.10.patch, YARN-1366.11.patch, YARN-1366.12.patch,
YARN-1366.2.patch, YARN-1366.3.patch, YARN-1366.4.patch, YARN-1366.5.patch, YARN-1366.6.patch,
YARN-1366.7.patch, YARN-1366.8.patch, YARN-1366.9.patch, YARN-1366.patch, YARN-1366.prototype.patch,
YARN-1366.prototype.patch
>
>
> The ApplicationMasterService currently sends a resync response to which the AM responds
by shutting down. The AM behavior is expected to change to calling resyncing with the RM.
Resync means resetting the allocate RPC sequence number to 0 and the AM should send its entire
outstanding request to the RM. Note that if the AM is making its first allocate call to the
RM then things should proceed like normal without needing a resync. The RM will return all
containers that have completed since the RM last synced with the AM. Some container completions
may be reported more than once.



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