Karthik Kambatla commented on YARN-2423:

[~hitesh] - in my optimistic opinion, Timeline v2 is at least 6 months out. 
Ideally, I would like for 2.8 to have come out before then, but that is besides 
the point. And, as Robert mentioned, I suspect it will take us at least another 
3 months to stabilize it enough to recommend it over Timeline v1. I feel it is 
only reasonable to provide a way for downstream apps to use the existing ATS 
until then.

Zhijie's suggestion of marking it Unstable and adding comments to capture the 
reason seems like a good approach to me. 

> TimelineClient should wrap all GET APIs to facilitate Java users
> ----------------------------------------------------------------
>                 Key: YARN-2423
>                 URL: https://issues.apache.org/jira/browse/YARN-2423
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Zhijie Shen
>            Assignee: Robert Kanter
>         Attachments: YARN-2423.004.patch, YARN-2423.005.patch, 
> YARN-2423.006.patch, YARN-2423.007.patch, YARN-2423.patch, YARN-2423.patch, 
> YARN-2423.patch
> TimelineClient provides the Java method to put timeline entities. It's also 
> good to wrap over all GET APIs (both entity and domain), and deserialize the 
> json response into Java POJO objects.

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