[jira] [Created] (YARN-8456) Fix a bug when user leave FPGA discover executable path configuration empty but set OpenCL SDK path environment variable

["Zhankun Tang (JIRA)" <ji...@apache.org>]

Zhankun Tang created YARN-8456:
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             Summary: Fix a bug when user leave FPGA discover executable path configuration empty but set OpenCL SDK path environment variable
                 Key: YARN-8456
                 URL: https://issues.apache.org/jira/browse/YARN-8456
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: yarn
            Reporter: Zhankun Tang


*Issue:*
When the user doesn't configure "yarn.nodemanager.resource-plugins.fpga.path-to-discovery-executables" in yarn-site.xml and have "ALTERAOCLSDKROOT" environment variable set, the FPGA discoverer cannot find the correct executable path (with IntelFPGAOpenclPlugin).

*Reason:*

In IntelFPGAOpenclPlugin,  the current code builds a wrong path string after getting the environment variable value. It should append "/bin/<executable name>" otherwise it would fail the FPGA resource discovery.

 

*Solution:*

Fix the path construction code in IntelFPGAOpenclPlugin.

 

*MISC:*

The patch also corrects some minor errors:
 # Change _"yarn-io/_gpu_"_ and _"yarn-io/_fpga_"_ to _"yarn.io/gpu"_, _"yarn.io/fpga"_ in documents
 # Use _"auto"_ as the default value for "yarn.nodemanager.resource-plugins.fpga.allowed-fpga-devices". The original "0,1" won't cause any problem but use "auto" is better

 



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