Tsuyoshi OZAWA commented on YARN-2921:

The test failure looks not related to my patch. [~kasha], could you take a 
look? This patch deals with "tests can get too slow" problem by shortening 
polling period. This value looks minimum value of sleep to success the tests, 
though I haven't inspected the reasons yet.

e.g. App moving to RUNNING state when we are waiting for it to get ACCEPTED.

I also found that it is a bit challenging to do this automatically - maybe 
Graph class is useful to know all transition, but I haven't done this not yet. 

> MockRM#waitForState methods can be too slow and flaky
> -----------------------------------------------------
>                 Key: YARN-2921
>                 URL: https://issues.apache.org/jira/browse/YARN-2921
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: test
>    Affects Versions: 2.6.0
>            Reporter: Karthik Kambatla
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-2921.001.patch, YARN-2921.002.patch, 
> YARN-2921.003.patch, YARN-2921.004.patch
> MockRM#waitForState methods currently sleep for too long (2 seconds and 1 
> second). This leads to slow tests and sometimes failures if the 
> App/AppAttempt moves to another state. 

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