[jira] [Created] (YARN-4330) MiniYARNCluster prints multiple Failed to instantiate default resource calculator warning messages

["Steve Loughran (JIRA)" <ji...@apache.org>]

Steve Loughran created YARN-4330:
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             Summary: MiniYARNCluster prints 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
            Priority: Blocker


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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