Mit Desai commented on YARN-2890:

The test {{testTimelineServiceStartInMiniCluster}} includes the following 
1) Timeline service should not start if {{TIMELINE_SERVICE_ENABLED == false}} 
and {{enableAHS}} is not set
2) Timeline service should not start if {{TIMELINE_SERVICE_ENABLED == false}} 
and {{enableAHS == false}}
3) Timeline service should start if {{TIMELINE_SERVICE_ENABLED == true }}and 
{{enableAHS == false}}
4) Timeline service should start if {{TIMELINE_SERVICE_ENABLED == false}} and 
{{enableAHS == true}}

Following scenarios not included:
1) {{TIMELINE_SERVICE_ENABLED == true}} and {{enableAHS}} is not set:: This 
case is already covered in the other tests in TestJobHistoryEventHandler
2) {{TIMELINE_SERVICE_ENABLED == true}} and {{enableAHS == true}}:: Timeline 
service will start if either of this is true. This case will be a duplicate of 
scenarios 3 and 4.

> MiniMRYarnCluster should turn on timeline service if configured to do so
> ------------------------------------------------------------------------
>                 Key: YARN-2890
>                 URL: https://issues.apache.org/jira/browse/YARN-2890
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Mit Desai
>            Assignee: Mit Desai
>         Attachments: YARN-2890.1.patch, YARN-2890.patch, YARN-2890.patch, 
> YARN-2890.patch, YARN-2890.patch, YARN-2890.patch
> Currently the MiniMRYarnCluster does not consider the configuration value for 
> enabling timeline service before starting. The MiniYarnCluster should only 
> start the timeline service if it is configured to do so.

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