[KshitijLakhani]

Description

Avoid the cached communicator replacement hang in the L1 distributed attention test sequence while the XLA/NCCL lifecycle issue is investigated. Scope the workaround to the attention pytest process.

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[KshitijLakhani]

/te-ci jax L0 L1

[greptile-apps]

Confidence Score: 5/5

[Low impact] The change appears safe to merge.

Summary

Disables NCCL communicator splitting for the L1 JAX distributed attention pytest process to avoid the reported communicator replacement hang.

• The attention CI run disables NCCL communicator splitting.

_{Reviews (1) · Last reviewed commit: "Merge branch 'main' into klakhani/fix/ja..." · Reviewed by Greptile}

[jberchtold-nvidia]

LGTM, thanks!