Naganarasimha G R commented on YARN-2838:

Hi [~zjshen]
      I will go through it (YARN-2033), but felt like some issues still stand 
valid even if plan to continue as timeline server itself.
# Whatever the CLI command user executes is historyserver or timelineserver it 
like ApplicationHistoryServer only run. So can we modify the name of the class 
ApplicationHistoryServer to TimelineHistoryServer (or any other suitable name 
it seems like any command user runs ApplicationHistoryServer is started)
# Instead of the "Starting the History Server anyway..." deprecated msg, can we 
"Starting the Timeline History Server anyway...".
# Based on start or stop, deprecated message should get modified to "Starting 
Timeline History Server anyway..." or "Stopping the Timeline History Server 
So if you comment on the individual issues/points would like to start fixing as 
part of this jira

There is also a 4th issue which i mentioned 
Missed to add point 4 : In YARNClientIMPL;history data can be either got from 
HistoryServer (old manager) or from TimeLineServer (new)
So historyServiceEnabled flag needs to check for both Timeline server 
configurations and ApplicationHistoryServer configurations, as data can be got 
from either of them.
I think this is also related to the issue which you mentioned ??We still didn't 
integrate TimelineClient and AHSClient, the latter of which is RPC interface of 
getting generic history information via RPC interface.??. But any way we need 
to fix this issue also right ? so already any jira is raised or shall i work as 
part of this jira ? 

And also please inform if this issue needs to be split into mulitple jiras 
(apart from documentation which you have already raised) would like to split 
and work on them.
As already i have started looking into these issues, was also planning to work 
on documentation. If you don't mind can you assign the issue (YARN-2854) to me ?

> Issues with TimeLineServer (Application History)
> ------------------------------------------------
>                 Key: YARN-2838
>                 URL: https://issues.apache.org/jira/browse/YARN-2838
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: timelineserver
>    Affects Versions: 2.5.1
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>         Attachments: IssuesInTimelineServer.pdf
> Few issues in usage of Timeline server for generic application history access

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