debugging flaky test_collective_operations with SIGABRT

[Borda]

…og parser

What does this PR do?

addresses https://github.com/Lightning-AI/pytorch-lightning/actions/runs/15691157537/job/44206405968

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📚 Documentation preview 📚: https://pytorch-lightning--20912.org.readthedocs.build/en/20912/

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 lightning_fabric: CPU workflow

Check ID	Status
fabric-cpu-guardian	success	✅

These checks are required after the changes to .github/workflows/ci-tests-fabric.yml.

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Thank you for your contribution! 💜

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48%. Comparing base (c03660a) to head (ffa5aaa).
⚠️ Report is 202 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (c03660a) and HEAD (ffa5aaa). Click for more details.

HEAD has 383 uploads less than BASE

Flag	BASE (c03660a)	HEAD (ffa5aaa)
cpu	107	27
python	12	3
lightning_fabric	26	12
pytest	56	27
python3.10	24	6
python3.12.7	35	9
python3.12	12	3
lightning	60	15
python3.11	24	6
gpu	3	0
pytorch2.1	12	0
pytorch_lightning	24	0
pytest-full	54	0
pytorch2.2.2	6	0
pytorch2.5	6	0
pytorch2.3	6	0
pytorch2.7	6	0
pytorch2.4.1	6	0
pytorch2.5.1	6	0
pytorch2.6	6	0

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #20912     +/-   ##
=========================================
- Coverage      87%      48%    -39%     
=========================================
  Files         268      265      -3     
  Lines       23442    23386     -56     
=========================================
- Hits        20391    11272   -9119     
- Misses       3051    12114   +9063     

[justusschock]

according to some online posts, this was fixed by setting GLOO_SOCKET_IFNAME. Can we try this instead of marking it as flaky?

[Borda]

according to some online posts, this was fixed by setting GLOO_SOCKET_IFNAME. Can we try this instead of marking it as flaky?

could you pls link the posts? 🙏