[action] [PR:22073] Fix the nnpy installation failure for test_copp#22160
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vmittal-msft merged 1 commit intosonic-net:202511from Jan 30, 2026
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[action] [PR:22073] Fix the nnpy installation failure for test_copp#22160vmittal-msft merged 1 commit intosonic-net:202511from
vmittal-msft merged 1 commit intosonic-net:202511from
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What is the motivation for this PR? To fix the failure of nnpy package installation, the root cause is This error—failed to map segment from shared object—is almost always caused by the /tmp partition being mounted with the noexec flag. In many security-hardened Linux environments (like those used for SONiC), the system prevents files in /tmp from being executed. Since pip creates a temporary build environment in /tmp to compile nnpy and cffi, the installation crashes when it tries to load the newly built library. The Fix: Change the Temporary Directory You can tell pip to use a different directory for building that has execution permissions (like your home directory or /var/tmp). Why nnpy specifically is failing? Unlike many other packages, nnpy is a "thick" wrapper around the C-library nanomsg. It uses a tool called CFFI (C Foreign Function Interface). pip downloads the nnpy source. It creates a "virtual" build environment in /tmp. It compiles a C-extension (_cffi_backend.so). It tries to "import" that C-extension to finish the metadata generation. The Linux kernel sees the file is in a noexec zone and kills the process, resulting in the error you saw. How did you do it? change to use /var/tmp-build as TMPDIR for cffi and nnpy installation. Signed-off-by: Zhaohui Sun <zhaohuisun@microsoft.com>
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YatishSVC
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Jan 30, 2026
vmittal-msft
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Jan 30, 2026
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Feb 11, 2026
…nic-net#22160) What is the motivation for this PR? To fix the failure of nnpy package installation, the root cause is This error—failed to map segment from shared object—is almost always caused by the /tmp partition being mounted with the noexec flag. In many security-hardened Linux environments (like those used for SONiC), the system prevents files in /tmp from being executed. Since pip creates a temporary build environment in /tmp to compile nnpy and cffi, the installation crashes when it tries to load the newly built library. The Fix: Change the Temporary Directory You can tell pip to use a different directory for building that has execution permissions (like your home directory or /var/tmp). Why nnpy specifically is failing? Unlike many other packages, nnpy is a "thick" wrapper around the C-library nanomsg. It uses a tool called CFFI (C Foreign Function Interface). pip downloads the nnpy source. It creates a "virtual" build environment in /tmp. It compiles a C-extension (_cffi_backend.so). It tries to "import" that C-extension to finish the metadata generation. The Linux kernel sees the file is in a noexec zone and kills the process, resulting in the error you saw. How did you do it? change to use /var/tmp-build as TMPDIR for cffi and nnpy installation. Signed-off-by: Zhaohui Sun <zhaohuisun@microsoft.com> Co-authored-by: Zhaohui Sun <94606222+ZhaohuiS@users.noreply.github.com> Signed-off-by: Lakshmi Yarramaneni <lakshmi@nexthop.ai>
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Description of PR
Summary:
Fixes # (issue)
nnpy package installation failed in test_copp on master image.
Type of change
Back port request
Approach
What is the motivation for this PR?
To fix the failure of nnpy package installation, the root cause is
This error—failed to map segment from shared object—is almost always caused by the /tmp partition being mounted with the noexec flag.
In many security-hardened Linux environments (like those used for SONiC), the system prevents files in /tmp from being executed. Since pip creates a temporary build environment in /tmp to compile nnpy and cffi, the installation crashes when it tries to load the newly built library.
The Fix: Change the Temporary Directory
You can tell pip to use a different directory for building that has execution permissions (like your home directory or /var/tmp).
Why nnpy specifically is failing?
The Linux kernel sees the file is in a noexec zone and kills the process, resulting in the error you saw.
How did you do it?
change to use
/var/tmp-buildasTMPDIRforcffiandnnpyinstallation.How did you verify/test it?
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation