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From "Hitesh Shah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-978) [YARN-321] Adding ApplicationAttemptReport and Protobuf implementation
Date Thu, 08 Aug 2013 19:04:49 GMT

    [ https://issues.apache.org/jira/browse/YARN-978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13733846#comment-13733846
] 

Hitesh Shah commented on YARN-978:
----------------------------------

Let me clarify my concerns.

What attributes' values are different from the overall app vs the attempt? Why is there a
final application status for an attempt when the attribute itself is described as the status
of the application i.e. not the status of an attempt. 
For a non-running attempt, what is the tracker url and the original tracking url? The tracker
url today for all application attempts is hidden by a proxy using a single url. Is the intent
now to change this behavior to now have different proxy urls per attempt?

Failed attempts have a failed yarn state - I am not sure why they would have an application
state. Failed attempts would register an app state with the RM ( during unregister ) if that
attempt is the final attempt.

The complete information on all attempts is useful except when it becomes confusing to users
as to what is specific to an attempt. It seems like the driving use case for this is the application
history server and to some extent, exposing users to the yarn state for the attempt so that
they can infer what is the current state of an attempt ( running/completed/failed ). It would
seem that not replicating data is beneficial to the history server to reduce amount of duplicated
data being stored. 

 

                
> [YARN-321] Adding ApplicationAttemptReport and Protobuf implementation
> ----------------------------------------------------------------------
>
>                 Key: YARN-978
>                 URL: https://issues.apache.org/jira/browse/YARN-978
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Mayank Bansal
>            Assignee: Xuan Gong
>             Fix For: YARN-321
>
>         Attachments: YARN-978-1.patch, YARN-978.2.patch, YARN-978.3.patch
>
>
> We dont have ApplicationAttemptReport and Protobuf implementation.
> Adding that.
> Thanks,
> Mayank

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