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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5561) [Atsv2] : Support for ability to retrieve apps/app-attempt/containers and entities via REST
Date Thu, 13 Oct 2016 03:26:22 GMT

    [ https://issues.apache.org/jira/browse/YARN-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15570688#comment-15570688
] 

Rohith Sharma K S commented on YARN-5561:
-----------------------------------------

bq. Could not get the intention behind pulling it out to a separate daemon though. Can you
elaborate on that ?
bq. could you elaborate more on the concrete use cases for the need of a separate daemon for
now?
I meant say, Initial idea is combine YARN entity reader along with TimelineReaderWebService.
In case folks do not agree then next proposal is  to pulling out as separate daemon. Even
I am decline for pulling out from timelinereader service but if other folks have any concern
for combining along with timelinereader then it is an option. 

bq. As we briefly discussed during the call the other day, what we need is a translation layer
that can create a Report object out of the timeline entity. If we implement such a translation
layer, would it satisfy this? 
Yes. Couple of more doubts just to be in sync, Does translation layer is with-in-the-reader
service or separate ? What is the format of report object? Is this report object is general
or only yarn entities?

> [Atsv2] : Support for ability to retrieve apps/app-attempt/containers and entities via
REST
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-5561
>                 URL: https://issues.apache.org/jira/browse/YARN-5561
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelinereader
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>         Attachments: 0001-YARN-5561.YARN-5355.patch, YARN-5561.02.patch, YARN-5561.03.patch,
YARN-5561.patch, YARN-5561.v0.patch
>
>
> ATSv2 model lacks retrieval of {{list-of-all-apps}}, {{list-of-all-app-attempts}} and
{{list-of-all-containers-per-attempt}} via REST API's. And also it is required to know about
all the entities in an applications.
> It is pretty much highly required these URLs for Web  UI.
> New REST URL would be 
> # GET {{/ws/v2/timeline/apps}}
> # GET {{/ws/v2/timeline/apps/\{app-id\}/appattempts}}.
> # GET {{/ws/v2/timeline/apps/\{app-id\}/appattempts/\{attempt-id\}/containers}}
> # GET {{/ws/v2/timeline/apps/\{app id\}/entities}} should display list of entities that
can be queried.  



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