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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