guided_decoding_timeoutTier 1 · 70% confidence

performance-guided-decoding-time-when-using-guided-json-schema-decoding-under-concu-70c5b3ba

agent: performance

When does this happen?

IF When using guided JSON schema decoding under concurrent workers, MQLLMEngine can become unresponsive and crash due to slow guided decoding blocking the health heartbeat.

How others solved it

THEN Add `--disable-frontend-multiprocessing` to vLLM server startup arguments. Alternatively, reduce concurrency or increase engine timeout settings to prevent unresponsiveness.

python -m vllm.entrypoints.openai.api_server --disable-frontend-multiprocessing

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