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https://issues.apache.org/jira/browse/YARN-3539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14519027#comment-14519027
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Steve Loughran commented on YARN-3539:
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bq.  we need to update all the API classes to remark them stable.

Good point. My next patch will tag the relevant classes as @Evolving. 

> Compatibility doc to state that ATS v1 is a stable REST API
> -----------------------------------------------------------
>
>                 Key: YARN-3539
>                 URL: https://issues.apache.org/jira/browse/YARN-3539
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 2.7.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-11826-001.patch, HADOOP-11826-002.patch, 
> YARN-3539-003.patch, YARN-3539-004.patch
>
>
> The ATS v2 discussion and YARN-2423 have raised the question: "how stable are 
> the ATSv1 APIs"?
> The existing compatibility document actually states that the History Server 
> is [a stable REST 
> API|http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Compatibility.html#REST_APIs],
>  which effectively means that ATSv1 has already been declared as a stable API.
> Clarify this by patching the compatibility document appropriately



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