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https://issues.apache.org/jira/browse/YARN-9477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830297#comment-16830297
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Peter Bacsko commented on YARN-9477:
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Thanks [~snemeth] for the comments.
_In VEDeviceDiscoverer#getDeviceState: Please use a more descriptive and
detailed error message rather than "Unknown <some_number>"_
That string was taken from the Python script given to us by NEC and will not be
printed as an error message, so I think it's good.
_Could you please add some testcases for VEDeviceDiscoverer?_
Yes, once this POC is considered to be good, I'll upload them as non-POC.
> Implement VE discovery using libudev
> ------------------------------------
>
> Key: YARN-9477
> URL: https://issues.apache.org/jira/browse/YARN-9477
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Major
> Attachments: YARN-9477-POC.patch, YARN-9477-POC2.patch,
> YARN-9477-POC3.patch
>
>
> Right now we have a Python script which is able to discover VE cards using
> pyudev: https://pyudev.readthedocs.io/en/latest/
> Java does not officially support libudev. There are some projects on Github
> (example: https://github.com/Zubnix/udev-java-bindings) but they're not
> available as Maven artifacts.
> However it's not that difficult to create a minimal layer around libudev
> using JNA. We don't have to wrap every function, we need to call 4-5 methods.
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