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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4330) MiniYARNCluster is showing multiple Failed to instantiate default resource calculator warning messages.
Date Mon, 07 Nov 2016 08:59:59 GMT

    [ https://issues.apache.org/jira/browse/YARN-4330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15643554#comment-15643554
] 

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

Thanks [~varun_saxena] for the explanation, i think for the first comment we can keep it as
existing behavior so that it works for 2.8 as the configuration for container monitoring is
not there in 2.8. And can you please take care of other comment ?
[~steve_l], any further comments are we can go ahead with the approach as captured in the
patch?

> 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
>         Attachments: YARN-4330.002.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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