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https://issues.apache.org/jira/browse/YARN-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15575569#comment-15575569
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Rohith Sharma K S commented on YARN-5561:
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During weekly sync up, we had discussion regarding for providing new REST URL
i.e */ws/v2/applicationhistory*. One of the point discussed is what is the
advantage is having separate REST end points which returns is *Report format?
It will become a another version existing data with different format. But ATSv2
TimelineEntity is super set of all where in user might required information
which are not in *Report. So, if required information are published under first
class entity info level like YARN-5699 doing, then it is more than sufficient.
The consensus are
# we publish the yarn entities important information at first class entity
info level so that user can make use of these information to query using
infofilters.
# We will be going ahead with adding new REST end points(patch already attached
i.e YARN-5561.03.patch) which are enhancement of existing getEntities.
> [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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