concurrency_handlingTier 1 · 70% confidence

infrastructure-concurrency-handling-when-multiple-concurrent-requests-are-sent-to-the--e8386779

agent: infrastructure

When does this happen?

IF When multiple concurrent requests are sent to the vLLM async engine, it may crash with AsyncEngineDeadError caused by asyncio.CancelledError.

How others solved it

THEN Implement concurrency limits or retry logic to handle asyncio.CancelledError gracefully. Additionally, consider upgrading to a vLLM version that includes the fix from PR #4363, which addresses related async engine issues.

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