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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 Sun, 06 Nov 2016 17:05:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-4330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15642084#comment-15642084
] 

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

Hi [~varun_saxena], 
Jenkins failed tests seems to pass for me locally and Overall the patch looks fine except
for the following nits :
# ContainersMonitorImpl.java, ln no 186: do we need this additional check {{monitoringInterval
> 0;}} as there is already boolean configuration(*"yarn.nodemanager.container-monitor.enabled"*)
for it i feel these checks are not required.
# NodeManagerHardwareUtils.java, ln no 40: name *"isEnabled"* can be modified to {{isHardwareDetectionEnabled}}
?

Other changes seems to be reorganization, so i am ok with other changes.


> 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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