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https://issues.apache.org/jira/browse/YARN-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15569539#comment-15569539
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Li Lu commented on YARN-5561:
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I'm generally OK with option 1, as it's quite consistent with my original
thought (see the comment on Aug. 30). The only thing I would like to mention
here is, we gave up this idea before because we thought when web UI requesting
data, it needs to contact two different endpoints. I'm not sure if with current
web UI use cases this problem is alleviated.
bq. This approach can be modified/enhanced to pulling out of ATSv2 to separate
daemon service OR can be start new service in RM itself with application
history.
I'd incline not to go this far as of now. Sure, architecturally we can keep
this flexibility, but could you elaborate more on the concrete use cases for
the need of a separate daemon for now?
> [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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