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Restrict UCX transports in CI to work around mpich 5 default #186

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Merged
xylar merged 1 commit into from
Aug 1, 2026
Merged

Restrict UCX transports in CI to work around mpich 5 default #186

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5 changes: 5 additions & 0 deletions .github/workflows/build_workflow.yml
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Expand Up @@ -14,6 +14,11 @@ env:
PATHS_IGNORE: '["**/README.md", "**/docs/**", "**/examples/**"]'
# Static python version for setting up pre-commit linting
PYTHON_VERSION: "3.14"
# mpich >=5 is built as ch4:ucx,ofi, so UCX is the default netmod. Azure-hosted
# GitHub runners expose a MANA RDMA device that UCX tries (and fails) to open,
# so MPI_Init() aborts inside ESMF_RegridWeightGen. Restrict UCX to transports
# that actually work on the runners.
UCX_TLS: "tcp,self,sm"

jobs:
pre-commit-hooks:
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