Github actions: fix OpenMPI network issue when running make ptest#218
Merged
wkliao merged 1 commit intoParallel-NetCDF:masterfrom Jan 30, 2026
Merged
Github actions: fix OpenMPI network issue when running make ptest#218wkliao merged 1 commit intoParallel-NetCDF:masterfrom
wkliao merged 1 commit intoParallel-NetCDF:masterfrom
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* Specify the loopback interface: Explicitly instruct Open MPI to use
the local loopback interface (lo0) for communications by setting the
OMPI_MCA_btl_tcp_if_include environment variable. In your terminal
(e.g., zsh or bash), run the following command:
+ export OMPI_MCA_btl_tcp_if_include=lo0
Then, try running your MPI program again.
* Set a short temporary directory path: In some cases, long file names in
the default temporary directory can cause issues on macOS. Setting the
TMPDIR environment variable to a shorter path like /tmp can help:
+ export TMPDIR=/tmp
After setting this, try running your MPI program.
* Error message:
[iad20-eo1205-ccaaba69-b68d-4eae-afa9-dee869e099ae-2690965F61F0.local:90667]
ptl_tool: problems getting address for index 0 (kernel index -1)
--------------------------------------------------------------------------
You requested support for tool connections, but no available
FAIL: nprocs=./pnetcdf-permute ---- pnetcdf-permute
interfaces were found after applying any include or exclude directives:
Include: NULL
Exclude: NULL
Available:
Please adjust your include or exclude to allow selection of an
available interface.
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Github CI failed sporadically when running "make ptest" using OpenMPI on Mac OS with the below error message.
Potential fixes are:
Specify the loopback interface: Explicitly instruct Open MPI to use the local loopback interface (lo0) for communications by setting the OMPI_MCA_btl_tcp_if_include environment variable. In your terminal (e.g., zsh or bash), run the following command:
Set a short temporary directory path: In some cases, long file names in the default temporary directory can cause issues on macOS. Setting the TMPDIR environment variable to a shorter path like /tmp can help: