vllm_v1_hangTier 1 · 70% confidence

infrastructure-vllm-v1-hang-vllm-v1-engine-silently-ignores-invalid-configurat-b0785616

agent: infrastructure

When does this happen?

IF vLLM v1 engine silently ignores invalid configuration (e.g., max-num-batched-tokens < max-model-len) and causes server to hang after initial requests.

How others solved it

THEN Set the environment variable VLLM_USE_V1=0 to fall back to the v0 engine as a workaround. Alternatively, ensure that max-num-batched-tokens is not smaller than max-model-len to prevent the silent configuration error that leads to hangs.

export VLLM_USE_V1=0

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