更新 20251014.md
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20251014.md
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20251014.md
@ -61,134 +61,4 @@ vllm serve /home/ss/vllm-py12/qwen3-06b \
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--max-model-len 32768 \
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--trust-remote-code
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```
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#### 新建了一个脚本去测试结构化输出函数的bug
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```shell
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vim /home/ss/vllm-py12/vllm-crash-test.py
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```
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```python
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from enum import Enum
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from pydantic import BaseModel
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from vllm import LLM, SamplingParams
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from vllm.sampling_params import GuidedDecodingParams
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# 定义结构化输出 schema
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class CarType(str, Enum):
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sedan = "sedan"
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suv = "SUV"
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truck = "Truck"
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coupe = "Coupe"
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class CarDescription(BaseModel):
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brand: str
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model: str
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car_type: CarType
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# 获取 JSON schema
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json_schema = CarDescription.model_json_schema()
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# 设置 prompt
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prompt = (
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"Generate a JSON with the brand, model and car_type of "
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"the most iconic car from the 90's"
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)
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def format_output(title: str, output: str):
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print(f"{'-' * 50}\n{title}: {output}\n{'-' * 50}")
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def main():
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# 1. 初始化本地 LLM，加载本地模型文件
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llm = LLM(
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model="/home/ss/vllm-py12/qwen3-06b", # 指向你的本地模型路径
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max_model_len=1024,
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enable_prefix_caching=True,
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gpu_memory_utilization=0.9,
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)
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# 2. 构造一个无效的 guided_decoding：没有任何有效字段
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# 这将导致 get_structured_output_key() 中 raise ValueError
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guided_decoding_invalid = GuidedDecodingParams(
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json=None,
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json_object=False,
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regex=None,
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choice=None,
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grammar=None,
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structural_tag=None
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)
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sampling_params = SamplingParams(
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temperature=0.0,
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max_tokens=512,
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guided_decoding=guided_decoding_invalid # ✅ 传入但无有效字段
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)
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# 3. 生成输出（预期会触发 ValueError）
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try:
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outputs = llm.generate(prompts=prompt, sampling_params=sampling_params)
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for output in outputs:
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generated_text = output.outputs[0].text
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format_output("Output", generated_text)
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except Exception as e:
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print(f"Caught expected error: {e}")
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if __name__ == "__main__":
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main()
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```
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#### 复现
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```shell
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python /home/ss/vllm-py12/vllm-crash-test.py
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```
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```text
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/home/ss/vllm-py12/vllm-crash-test.py:50: DeprecationWarning: guided_decoding is deprecated. This will be removed in v0.12.0 or v1.0.0, which ever is soonest. Please use structured_outputs instead.
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sampling_params = SamplingParams(
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Adding requests: 100%|████████████████████████████████████████████████████████████████████| 1/1 [00:00<00:00, 93.46it/s]
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Processed prompts: 0%| | 0/1 [00:00<?, ?it/s, est. speed input: 0.00 toks/s, output: 0.00 toks/s](EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] EngineCore encountered a fatal error.
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] Traceback (most recent call last):
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/engine/core.py", line 701, in run_engine_core
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] engine_core.run_busy_loop()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/engine/core.py", line 728, in run_busy_loop
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] self._process_engine_step()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/engine/core.py", line 754, in _process_engine_step
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] outputs, model_executed = self.step_fn()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/engine/core.py", line 283, in step
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] scheduler_output = self.scheduler.schedule()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/core/sched/scheduler.py", line 359, in schedule
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] if structured_output_req and structured_output_req.grammar:
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/structured_output/request.py", line 45, in grammar
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] completed = self._check_grammar_completion()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/structured_output/request.py", line 33, in _check_grammar_completion
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] self._grammar = self._grammar.result(timeout=0.0001)
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/concurrent/futures/_base.py", line 449, in result
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] return self.__get_result()
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] raise self._exception
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/concurrent/futures/thread.py", line 59, in run
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] result = self.fn(*self.args, **self.kwargs)
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/structured_output/__init__.py", line 128, in _async_create_grammar
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] key = request.structured_output_request.structured_output_key # type: ignore[union-attr]
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/functools.py", line 998, in __get__
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] val = self.func(instance)
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/structured_output/request.py", line 58, in structured_output_key
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] return get_structured_output_key(self.sampling_params)
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] File "/root/miniconda3/envs/vllm-py12/lib/python3.12/site-packages/vllm/v1/structured_output/request.py", line 86, in get_structured_output_key
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] raise ValueError("No valid structured output parameter found")
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(EngineCore_DP0 pid=190093) ERROR 10-15 10:50:58 [core.py:710] ValueError: No valid structured output parameter found
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Caught expected error: EngineCore encountered an issue. See stack trace (above) for the root cause.
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Processed prompts: 0%| | 0/1 [00:00<?, ?it/s, est. speed input: 0.00 toks/s, output: 0.00 toks/s]
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(vllm-py12) root@ss-IdeaPad-PC:/home/ss/vllm-py12#
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```
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