[jira] [Commented] (YARN-4330) MiniYARNCluster is showing multiple Failed to instantiate default resource calculator warning messages.

["Naganarasimha G R (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-4330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15723951#comment-15723951 ] 

Naganarasimha G R commented on YARN-4330:
-----------------------------------------

Hi [~varun_saxena] & [~steve_l],
Is it ok to fix this issue in 2.9 and trunk ? shall i resolve this issue or still you guys have plans for 2.8 ? 
IMO its not a must for 2.8 but feel its good to have. Please share your thoughts 

> MiniYARNCluster is showing multiple  Failed to instantiate default resource calculator warning messages.
> --------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4330
>                 URL: https://issues.apache.org/jira/browse/YARN-4330
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: test, yarn
>    Affects Versions: 2.8.0
>         Environment: OSX, JUnit
>            Reporter: Steve Loughran
>            Assignee: Varun Saxena
>            Priority: Blocker
>              Labels: oct16-hard
>             Fix For: 2.9.0, 3.0.0-alpha2
>
>         Attachments: YARN-4330.002.patch, YARN-4330.003.patch, YARN-4330.004.patch, YARN-4330.01.patch
>
>
> Whenever I try to start a MiniYARNCluster on Branch-2 (commit #0b61cca), I see multiple stack traces warning me that a resource calculator plugin could not be created
> {code}
> (ResourceCalculatorPlugin.java:getResourceCalculatorPlugin(184)) - java.lang.UnsupportedOperationException: Could not determine OS: Failed to instantiate default resource calculator.
> java.lang.UnsupportedOperationException: Could not determine OS
> {code}
> This is a minicluster. It doesn't need resource calculation. It certainly doesn't need test logs being cluttered with even more stack traces which will only generate false alarms about tests failing. 
> There needs to be a way to turn this off, and the minicluster should have it that way by default.
> Being ruthless and marking as a blocker, because its a fairly major regression for anyone testing with the minicluster.



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