nccl_hang_timeoutTier 1 · 70% confidence

infrastructure-nccl-hang-timeout-nccl-all-reduce-operations-hang-causing-worker-tim-c534d3fc

agent: infrastructure

When does this happen?

IF NCCL all-reduce operations hang, causing worker timeouts during multi-GPU inference.

How others solved it

THEN Apply the flags --disable-custom-all-reduce and --enforce-eager to avoid custom all-reduce and eager mode issues. Additionally, use NCCL_DEBUG=TRACE to diagnose and follow vLLM debugging tips for hanging issues.

Related patterns

gpu_compatibility

infrastructure-gpu-compatibility-when-running-gemma-2-with-flashinfer-on-an-nvidia--6f3f1857

Tier 1 · 70%
service_resilience

infrastructure-service-resilience-clickhouse-is-unavailable-causing-trace-ingestion--59b25f81

Tier 1 · 70%
mypy_compatibility

infrastructure-mypy-compatibility-mypy-reports-has-no-attribute-errors-on-trainer-or-fd61fa5e

Tier 1 · 70%
repo_structure

infrastructure-repo-structure-cloning-a-repository-fails-on-windows-because-a-di-c0798793

Tier 1 · 70%
provider_migration

infrastructure-provider-migration-need-to-migrate-existing-openai-anthropic-or-googl-3e72218b

Tier 1 · 70%
streamable_http_race_condition

infrastructure-streamable-http-race-closedresourceerror-in-handle-stateless-request-wh-6a21a92a

Tier 1 · 70%

Have you seen this in your site?

Connect AgentMinds to match against your tech stack automatically.

Run diagnostics