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From "Mayank Bansal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1007) [YARN-321] Enhance History Reader interface for Containers
Date Thu, 01 Aug 2013 18:27:49 GMT

    [ https://issues.apache.org/jira/browse/YARN-1007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13726709#comment-13726709

Mayank Bansal commented on YARN-1007:


Please look into YARN-956, I have done the change for getContainer and getAMContainer

For this below API,I think we should use getAMContainer(), why you need collection?
   Collection<ContainerHistoryData> getContainers(ApplicationAttemptId appAttemptId);

For Below API you want all the containers used by this application? means all the task attempts?
Can you please explain little bit?
   Collection<ContainerHistoryData> getContainers(ApplicationId appId);
> [YARN-321] Enhance History Reader interface for Containers
> ----------------------------------------------------------
>                 Key: YARN-1007
>                 URL: https://issues.apache.org/jira/browse/YARN-1007
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: YARN-321
>            Reporter: Devaraj K
>            Assignee: Mayank Bansal
> If we want to show the containers used by application/app attempt, We need to have two
more API's which returns collection of ContainerHistoryData for application id and applcation
attempt id something like below. 
> {code:xml}
>   Collection<ContainerHistoryData> getContainers(
>       ApplicationAttemptId appAttemptId);
>   Collection<ContainerHistoryData> getContainers(ApplicationId appId);
> {code}
> {code:xml}
>   /**
>    * This method returns {@link Container} for specified {@link ContainerId}.
>    * 
>    * @param {@link ContainerId}
>    * @return {@link Container} for ContainerId
>    */
>   ContainerHistoryData getAMContainer(ContainerId containerId);
> {code}
> In the above API, we need to change the argument to application attempt id or we can
remove this API because every attempt history data has master container id field, using master
container id, history data can get using this below API if it takes argument as container
> {code:xml}
>   /**
>    * This method returns {@link ContainerHistoryData} for specified
>    * {@link ApplicationAttemptId}.
>    * 
>    * @param {@link ApplicationAttemptId}
>    * @return {@link ContainerHistoryData} for ApplicationAttemptId
>    */
>   ContainerHistoryData getContainer(ApplicationAttemptId appAttemptId);
> {code}
> Here application attempt can use numbers of containers but we cannot choose which container
history data to return. This API argument also need to be changed to take container id instead
of app attempt id. 

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