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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 Mon, 29 Aug 2016 06:53:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15445004#comment-15445004
] 

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

Looking into code base for reader for supporting these REST end points. I see that ApplicationTable
schema is defined with row key *clusterId!userName!flowName!flowRunId!AppId*. 
# */apps* without userId and flowName should be able to read. Currently it is mandatory that
to read apps to provide userId and flowName.
# */apps/\{app-id\}/app-attempts* can be redirect to existing getEntity for YARN-APPLICATIOIN-ENTITY.

# */apps/\{app-id\}/app-attempt/\{app-attempt-id\}/containers*.  As per design, YARN_APPLICATION_ATTEMPT
and YARN_CONTAINERS are stored as general entities. Reading will be same as others user entities.
I think there should be another hbase table that stores YARN specific entities. Otherwise
it is big overhead for clients to parse output to know about its parent entity.

> [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: Bug
>          Components: timelinereader
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>
> 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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