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From "Szilard Nemeth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-9121) Users of GpuDiscoverer.getInstance() are not possible to test as instance is a static field
Date Fri, 22 Feb 2019 21:15:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-9121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775614#comment-16775614
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Szilard Nemeth commented on YARN-9121:
--------------------------------------

[~sunilg]: Findbugs complains about GpuResourcePlugin.gpuResourceHandler is accessed inconsistently
in terms of synchronization.
As I haven't touched this field at all, could we ignore this error for this patch?
Thanks!

> Users of GpuDiscoverer.getInstance() are not possible to test as instance is a static
field
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-9121
>                 URL: https://issues.apache.org/jira/browse/YARN-9121
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Szilard Nemeth
>            Assignee: Szilard Nemeth
>            Priority: Major
>         Attachments: YARN-9121.001.patch, YARN-9121.002.patch
>
>
> The clients of GpuDiscoverer are very hard to test as they call GpuDiscoverer.getInstance()
internally.
> For example, writing tests for org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu.GpuResourcePlugin#getNMResourceInfo
is quite hard as the GpuDeviceInformation returned by GpuDiscoverer is not interchangeable
as GpuDiscoverer is not mockable since we cannot inject it in tests. 



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