Skip to content

CI: pin UCX transports — retire the MANA-NIC MPI_Init flake (#461) #529

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
lmoresi merged 1 commit into from
Aug 13, 2026
Merged

CI: pin UCX transports — retire the MANA-NIC MPI_Init flake (#461) #529

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 9 additions & 0 deletions .github/workflows/build_uw3_and_test.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,15 @@ on:

workflow_dispatch:

env:
# Some Azure runners carry a MANA NIC whose InfiniBand verbs device UCX
# advertises but cannot open: uct_iface_open(ud_verbs/mana_0) fails inside
# MPI_Init, so `import underworld3` dies before any UW3 code runs (issues
# #461/#528 — four hits in the first week of 2026-08, each costing a manual
# re-roll). A single-node CI runner needs only shared memory and TCP, so pin
# the UCX transports and retire the whole flake class.
UCX_TLS: tcp,sm,self

jobs:
test:
runs-on: ubuntu-latest
Expand Down
Loading