vllm - 💡(How to fix) Fix [Bug]: vLLM crashed when working with CPU offloading [1 comments, 1 participants]

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vllm-project/vllm#38515Fetched 2026-04-08 01:53:40
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Error Message

(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] AsyncLLM output_handler failed. (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] Traceback (most recent call last): (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] logger_ref[0].record( (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] stat_logger.record( (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] self.counter_prompt_tokens_by_source[source][engine_idx].inc( (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] raise ValueError('Counters can only be incremented by non-negative amounts.') (APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] ValueError: Counters can only be incremented by non-negative amounts. (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator. (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last): (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] async for res in result_generator: (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] out = q.get_nowait() or await q.get() (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ^^^^^^^^^^^^^ (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] raise output (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] logger_ref[0].record( (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] stat_logger.record( (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] self.counter_prompt_tokens_by_source[source][engine_idx].inc( (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] raise ValueError('Counters can only be incremented by non-negative amounts.') (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts. (APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Error in message stream converter.

Root Cause

(APIServer pid=1) INFO 03-30 05:52:17 [metrics.py:103] KV Transfer metrics: GPU_to_CPU_total_bytes=5578817536, GPU_to_CPU_total_time=0.5537267196178438, CPU_to_GPU_total_bytes=26337869824, CPU_to_GPU_total_time=2.0508480224609373
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 200 OK
(APIServer pid=1) INFO:     172.17.0.1:37668 - "POST /v1/messages?beta=true HTTP/1.1" 200 OK
(APIServer pid=1) INFO:     172.17.0.1:33254 - "POST /v1/chat/completions HTTP/1.1" 200 OK
(APIServer pid=1) INFO 03-30 05:52:27 [loggers.py:259] Engine 000: Avg prompt throughput: 26.1 tokens/s, Avg generation throughput: 18.7 tokens/s, Running: 1 reqs, Waiting: 2 reqs, GPU KV cache usage: 12.4%, Prefix cache hit rate: 68.1%, External prefix cache hit rate: 56.6%
(APIServer pid=1) INFO 03-30 05:52:27 [metrics.py:103] KV Transfer metrics: CPU_to_GPU_total_bytes=7090339840, CPU_to_GPU_total_time=0.5460842066407204, GPU_to_CPU_total_bytes=5257822208, GPU_to_CPU_total_time=0.5265549793243409
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] AsyncLLM output_handler failed.
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Error in message stream converter.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 566, in message_stream_converter
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     origin_chunk = ChatCompletionStreamResponse.model_validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/pydantic/main.py", line 766, in model_validate_json
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     return cls.__pydantic_validator__.validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] pydantic_core._pydantic_core.ValidationError: 2 validation errors for ChatCompletionStreamResponse
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] model
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] choices
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Error in message stream converter.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 566, in message_stream_converter
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     origin_chunk = ChatCompletionStreamResponse.model_validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/pydantic/main.py", line 766, in model_validate_json
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     return cls.__pydantic_validator__.validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] pydantic_core._pydantic_core.ValidationError: 2 validation errors for ChatCompletionStreamResponse
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] model
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] choices
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) INFO:     Shutting down
(APIServer pid=1) INFO:     Waiting for application shutdown.
(APIServer pid=1) INFO:     Application shutdown complete.
(APIServer pid=1) INFO:     Finished server process [1]
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1217] Shutdown initiated (timeout=0)
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1222] Aborting 3 requests
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1240] Shutdown complete
(Worker pid=439) (Worker_TP2 pid=439) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=440) (Worker_TP3 pid=440) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=437) (Worker_TP0 pid=437) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=438) (Worker_TP1 pid=438) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=439) (Worker_TP2 pid=439) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=440) (Worker_TP3 pid=440) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=437) (Worker_TP0 pid=437) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=438) (Worker_TP1 pid=438) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.

Fix Action

Fix / Workaround

============================== CPU Info

Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 52 bits physical, 57 bits virtual Byte Order: Little Endian CPU(s): 128 On-line CPU(s) list: 0-127 Vendor ID: GenuineIntel Model name: Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz CPU family: 6 Model: 106 Thread(s) per core: 2 Core(s) per socket: 32 Socket(s): 2 Stepping: 6 CPU max MHz: 3200.0000 CPU min MHz: 800.0000 BogoMIPS: 4000.00 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 invpcid_single intel_ppin ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local split_lock_detect wbnoinvd dtherm ida arat pln pts avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq la57 rdpid fsrm md_clear pconfig flush_l1d arch_capabilities Virtualization: VT-x L1d cache: 3 MiB (64 instances) L1i cache: 2 MiB (64 instances) L2 cache: 80 MiB (64 instances) L3 cache: 96 MiB (2 instances) NUMA node(s): 2 NUMA node0 CPU(s): 0-31,64-95 NUMA node1 CPU(s): 32-63,96-127 Vulnerability Gather data sampling: Mitigation; Microcode Vulnerability Itlb multihit: Not affected Vulnerability L1tf: Not affected Vulnerability Mds: Not affected Vulnerability Meltdown: Not affected Vulnerability Mmio stale data: Mitigation; Clear CPU buffers; SMT vulnerable Vulnerability Reg file data sampling: Not affected Vulnerability Retbleed: Not affected Vulnerability Spec rstack overflow: Not affected Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization Vulnerability Spectre v2: Mitigation; Enhanced / Automatic IBRS; IBPB conditional; RSB filling; PBRSB-eIBRS SW sequence; BHI SW loop, KVM SW loop Vulnerability Srbds: Not affected Vulnerability Tsx async abort: Not affected

Code Example

root@0737af02a7f8:~# python3 collect_env.py
Collecting environment information...
==============================
        System Info
==============================
OS                           : Ubuntu 22.04.5 LTS (x86_64)
GCC version                  : (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0
Clang version                : Could not collect
CMake version                : Could not collect
Libc version                 : glibc-2.35

==============================
       PyTorch Info
==============================
PyTorch version              : 2.10.0+cu129
Is debug build               : False
CUDA used to build PyTorch   : 12.9
ROCM used to build PyTorch   : N/A

==============================
      Python Environment
==============================
Python version               : 3.12.13 (main, Mar  4 2026, 09:23:07) [GCC 11.4.0] (64-bit runtime)
Python platform              : Linux-5.15.0-117-generic-x86_64-with-glibc2.35

==============================
       CUDA / GPU Info
==============================
Is CUDA available            : True
CUDA runtime version         : 12.9.86
CUDA_MODULE_LOADING set to   :
GPU models and configuration :
GPU 0: NVIDIA A100 80GB PCIe
GPU 1: NVIDIA A100 80GB PCIe
GPU 2: NVIDIA A100 80GB PCIe
GPU 3: NVIDIA A100 80GB PCIe

Nvidia driver version        : 560.28.03
cuDNN version                : Could not collect
HIP runtime version          : N/A
MIOpen runtime version       : N/A
Is XNNPACK available         : True

==============================
          CPU Info
==============================
Architecture:                         x86_64
CPU op-mode(s):                       32-bit, 64-bit
Address sizes:                        52 bits physical, 57 bits virtual
Byte Order:                           Little Endian
CPU(s):                               128
On-line CPU(s) list:                  0-127
Vendor ID:                            GenuineIntel
Model name:                           Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz
CPU family:                           6
Model:                                106
Thread(s) per core:                   2
Core(s) per socket:                   32
Socket(s):                            2
Stepping:                             6
CPU max MHz:                          3200.0000
CPU min MHz:                          800.0000
BogoMIPS:                             4000.00
Flags:                                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 invpcid_single intel_ppin ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local split_lock_detect wbnoinvd dtherm ida arat pln pts avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq la57 rdpid fsrm md_clear pconfig flush_l1d arch_capabilities
Virtualization:                       VT-x
L1d cache:                            3 MiB (64 instances)
L1i cache:                            2 MiB (64 instances)
L2 cache:                             80 MiB (64 instances)
L3 cache:                             96 MiB (2 instances)
NUMA node(s):                         2
NUMA node0 CPU(s):                    0-31,64-95
NUMA node1 CPU(s):                    32-63,96-127
Vulnerability Gather data sampling:   Mitigation; Microcode
Vulnerability Itlb multihit:          Not affected
Vulnerability L1tf:                   Not affected
Vulnerability Mds:                    Not affected
Vulnerability Meltdown:               Not affected
Vulnerability Mmio stale data:        Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed:               Not affected
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; Enhanced / Automatic IBRS; IBPB conditional; RSB filling; PBRSB-eIBRS SW sequence; BHI SW loop, KVM SW loop
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected

==============================
Versions of relevant libraries
==============================
[pip3] flashinfer-python==0.6.4
[pip3] numpy==2.2.6
[pip3] nvidia-cublas-cu12==12.9.1.4
[pip3] nvidia-cuda-cupti-cu12==12.9.79
[pip3] nvidia-cuda-nvrtc-cu12==12.9.86
[pip3] nvidia-cuda-runtime-cu12==12.9.79
[pip3] nvidia-cudnn-cu12==9.10.2.21
[pip3] nvidia-cudnn-frontend==1.19.0
[pip3] nvidia-cufft-cu12==11.4.1.4
[pip3] nvidia-cufile-cu12==1.14.1.1
[pip3] nvidia-curand-cu12==10.3.10.19
[pip3] nvidia-cusolver-cu12==11.7.5.82
[pip3] nvidia-cusparse-cu12==12.5.10.65
[pip3] nvidia-cusparselt-cu12==0.7.1
[pip3] nvidia-cutlass-dsl==4.4.1
[pip3] nvidia-cutlass-dsl-libs-base==4.4.1
[pip3] nvidia-ml-py==13.590.48
[pip3] nvidia-nccl-cu12==2.27.5
[pip3] nvidia-nvjitlink-cu12==12.9.86
[pip3] nvidia-nvshmem-cu12==3.4.5
[pip3] nvidia-nvtx-cu12==12.9.79
[pip3] pyzmq==27.1.0
[pip3] torch==2.10.0+cu129
[pip3] torch_c_dlpack_ext==0.1.5
[pip3] torchaudio==2.10.0+cu129
[pip3] torchvision==0.25.0+cu129
[pip3] transformers==4.57.6
[pip3] triton==3.6.0
[conda] Could not collect

==============================
         vLLM Info
==============================
ROCM Version                 : Could not collect
vLLM Version                 : 0.17.0rc1.dev204+g04b67d8f6 (git sha: 04b67d8f6)
vLLM Build Flags:
  CUDA Archs: 7.0 7.5 8.0 8.9 9.0 10.0 12.0; ROCm: Disabled
GPU Topology:
        GPU0    GPU1    GPU2    GPU3    CPU Affinity    NUMA Affinity   GPU NUMA ID
GPU0     X      PXB     SYS     SYS     0-31,64-95      0               N/A
GPU1    PXB      X      SYS     SYS     0-31,64-95      0               N/A
GPU2    SYS     SYS      X      PXB     32-63,96-127    1               N/A
GPU3    SYS     SYS     PXB      X      32-63,96-127    1               N/A

Legend:

  X    = Self
  SYS  = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
  NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
  PHB  = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
  PXB  = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
  PIX  = Connection traversing at most a single PCIe bridge
  NV#  = Connection traversing a bonded set of # NVLinks

==============================
     Environment Variables
==============================
NVIDIA_VISIBLE_DEVICES=all
NCCL_P2P_DISABLE=1
NVIDIA_REQUIRE_CUDA=cuda>=12.9 brand=unknown,driver>=535,driver<536 brand=grid,driver>=535,driver<536 brand=tesla,driver>=535,driver<536 brand=nvidia,driver>=535,driver<536 brand=quadro,driver>=535,driver<536 brand=quadrortx,driver>=535,driver<536 brand=nvidiartx,driver>=535,driver<536 brand=vapps,driver>=535,driver<536 brand=vpc,driver>=535,driver<536 brand=vcs,driver>=535,driver<536 brand=vws,driver>=535,driver<536 brand=cloudgaming,driver>=535,driver<536 brand=unknown,driver>=550,driver<551 brand=grid,driver>=550,driver<551 brand=tesla,driver>=550,driver<551 brand=nvidia,driver>=550,driver<551 brand=quadro,driver>=550,driver<551 brand=quadrortx,driver>=550,driver<551 brand=nvidiartx,driver>=550,driver<551 brand=vapps,driver>=550,driver<551 brand=vpc,driver>=550,driver<551 brand=vcs,driver>=550,driver<551 brand=vws,driver>=550,driver<551 brand=cloudgaming,driver>=550,driver<551 brand=unknown,driver>=560,driver<561 brand=grid,driver>=560,driver<561 brand=tesla,driver>=560,driver<561 brand=nvidia,driver>=560,driver<561 brand=quadro,driver>=560,driver<561 brand=quadrortx,driver>=560,driver<561 brand=nvidiartx,driver>=560,driver<561 brand=vapps,driver>=560,driver<561 brand=vpc,driver>=560,driver<561 brand=vcs,driver>=560,driver<561 brand=vws,driver>=560,driver<561 brand=cloudgaming,driver>=560,driver<561 brand=unknown,driver>=565,driver<566 brand=grid,driver>=565,driver<566 brand=tesla,driver>=565,driver<566 brand=nvidia,driver>=565,driver<566 brand=quadro,driver>=565,driver<566 brand=quadrortx,driver>=565,driver<566 brand=nvidiartx,driver>=565,driver<566 brand=vapps,driver>=565,driver<566 brand=vpc,driver>=565,driver<566 brand=vcs,driver>=565,driver<566 brand=vws,driver>=565,driver<566 brand=cloudgaming,driver>=565,driver<566 brand=unknown,driver>=570,driver<571 brand=grid,driver>=570,driver<571 brand=tesla,driver>=570,driver<571 brand=nvidia,driver>=570,driver<571 brand=quadro,driver>=570,driver<571 brand=quadrortx,driver>=570,driver<571 brand=nvidiartx,driver>=570,driver<571 brand=vapps,driver>=570,driver<571 brand=vpc,driver>=570,driver<571 brand=vcs,driver>=570,driver<571 brand=vws,driver>=570,driver<571 brand=cloudgaming,driver>=570,driver<571
TORCH_CUDA_ARCH_LIST=7.0 7.5 8.0 8.9 9.0 10.0 12.0
NVIDIA_DRIVER_CAPABILITIES=compute,utility
VLLM_USAGE_SOURCE=production-docker-image
CUDA_VERSION=12.9.1
VLLM_ENABLE_CUDA_COMPATIBILITY=0
LD_LIBRARY_PATH=/usr/local/nvidia/lib64:/usr/local/cuda/lib64:/usr/local/cuda/lib64
PYTORCH_NVML_BASED_CUDA_CHECK=1
TORCHINDUCTOR_COMPILE_THREADS=1
TORCHINDUCTOR_CACHE_DIR=/tmp/torchinductor_root

---

</details>


### 🐛 Describe the bug

Run command

---

Crash logs
RAW_BUFFERClick to expand / collapse

Your current environment

<details> <summary>The output of <code>python collect_env.py</code></summary>
root@0737af02a7f8:~# python3 collect_env.py
Collecting environment information...
==============================
        System Info
==============================
OS                           : Ubuntu 22.04.5 LTS (x86_64)
GCC version                  : (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0
Clang version                : Could not collect
CMake version                : Could not collect
Libc version                 : glibc-2.35

==============================
       PyTorch Info
==============================
PyTorch version              : 2.10.0+cu129
Is debug build               : False
CUDA used to build PyTorch   : 12.9
ROCM used to build PyTorch   : N/A

==============================
      Python Environment
==============================
Python version               : 3.12.13 (main, Mar  4 2026, 09:23:07) [GCC 11.4.0] (64-bit runtime)
Python platform              : Linux-5.15.0-117-generic-x86_64-with-glibc2.35

==============================
       CUDA / GPU Info
==============================
Is CUDA available            : True
CUDA runtime version         : 12.9.86
CUDA_MODULE_LOADING set to   :
GPU models and configuration :
GPU 0: NVIDIA A100 80GB PCIe
GPU 1: NVIDIA A100 80GB PCIe
GPU 2: NVIDIA A100 80GB PCIe
GPU 3: NVIDIA A100 80GB PCIe

Nvidia driver version        : 560.28.03
cuDNN version                : Could not collect
HIP runtime version          : N/A
MIOpen runtime version       : N/A
Is XNNPACK available         : True

==============================
          CPU Info
==============================
Architecture:                         x86_64
CPU op-mode(s):                       32-bit, 64-bit
Address sizes:                        52 bits physical, 57 bits virtual
Byte Order:                           Little Endian
CPU(s):                               128
On-line CPU(s) list:                  0-127
Vendor ID:                            GenuineIntel
Model name:                           Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz
CPU family:                           6
Model:                                106
Thread(s) per core:                   2
Core(s) per socket:                   32
Socket(s):                            2
Stepping:                             6
CPU max MHz:                          3200.0000
CPU min MHz:                          800.0000
BogoMIPS:                             4000.00
Flags:                                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 invpcid_single intel_ppin ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local split_lock_detect wbnoinvd dtherm ida arat pln pts avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq la57 rdpid fsrm md_clear pconfig flush_l1d arch_capabilities
Virtualization:                       VT-x
L1d cache:                            3 MiB (64 instances)
L1i cache:                            2 MiB (64 instances)
L2 cache:                             80 MiB (64 instances)
L3 cache:                             96 MiB (2 instances)
NUMA node(s):                         2
NUMA node0 CPU(s):                    0-31,64-95
NUMA node1 CPU(s):                    32-63,96-127
Vulnerability Gather data sampling:   Mitigation; Microcode
Vulnerability Itlb multihit:          Not affected
Vulnerability L1tf:                   Not affected
Vulnerability Mds:                    Not affected
Vulnerability Meltdown:               Not affected
Vulnerability Mmio stale data:        Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed:               Not affected
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; Enhanced / Automatic IBRS; IBPB conditional; RSB filling; PBRSB-eIBRS SW sequence; BHI SW loop, KVM SW loop
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected

==============================
Versions of relevant libraries
==============================
[pip3] flashinfer-python==0.6.4
[pip3] numpy==2.2.6
[pip3] nvidia-cublas-cu12==12.9.1.4
[pip3] nvidia-cuda-cupti-cu12==12.9.79
[pip3] nvidia-cuda-nvrtc-cu12==12.9.86
[pip3] nvidia-cuda-runtime-cu12==12.9.79
[pip3] nvidia-cudnn-cu12==9.10.2.21
[pip3] nvidia-cudnn-frontend==1.19.0
[pip3] nvidia-cufft-cu12==11.4.1.4
[pip3] nvidia-cufile-cu12==1.14.1.1
[pip3] nvidia-curand-cu12==10.3.10.19
[pip3] nvidia-cusolver-cu12==11.7.5.82
[pip3] nvidia-cusparse-cu12==12.5.10.65
[pip3] nvidia-cusparselt-cu12==0.7.1
[pip3] nvidia-cutlass-dsl==4.4.1
[pip3] nvidia-cutlass-dsl-libs-base==4.4.1
[pip3] nvidia-ml-py==13.590.48
[pip3] nvidia-nccl-cu12==2.27.5
[pip3] nvidia-nvjitlink-cu12==12.9.86
[pip3] nvidia-nvshmem-cu12==3.4.5
[pip3] nvidia-nvtx-cu12==12.9.79
[pip3] pyzmq==27.1.0
[pip3] torch==2.10.0+cu129
[pip3] torch_c_dlpack_ext==0.1.5
[pip3] torchaudio==2.10.0+cu129
[pip3] torchvision==0.25.0+cu129
[pip3] transformers==4.57.6
[pip3] triton==3.6.0
[conda] Could not collect

==============================
         vLLM Info
==============================
ROCM Version                 : Could not collect
vLLM Version                 : 0.17.0rc1.dev204+g04b67d8f6 (git sha: 04b67d8f6)
vLLM Build Flags:
  CUDA Archs: 7.0 7.5 8.0 8.9 9.0 10.0 12.0; ROCm: Disabled
GPU Topology:
        GPU0    GPU1    GPU2    GPU3    CPU Affinity    NUMA Affinity   GPU NUMA ID
GPU0     X      PXB     SYS     SYS     0-31,64-95      0               N/A
GPU1    PXB      X      SYS     SYS     0-31,64-95      0               N/A
GPU2    SYS     SYS      X      PXB     32-63,96-127    1               N/A
GPU3    SYS     SYS     PXB      X      32-63,96-127    1               N/A

Legend:

  X    = Self
  SYS  = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
  NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
  PHB  = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
  PXB  = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
  PIX  = Connection traversing at most a single PCIe bridge
  NV#  = Connection traversing a bonded set of # NVLinks

==============================
     Environment Variables
==============================
NVIDIA_VISIBLE_DEVICES=all
NCCL_P2P_DISABLE=1
NVIDIA_REQUIRE_CUDA=cuda>=12.9 brand=unknown,driver>=535,driver<536 brand=grid,driver>=535,driver<536 brand=tesla,driver>=535,driver<536 brand=nvidia,driver>=535,driver<536 brand=quadro,driver>=535,driver<536 brand=quadrortx,driver>=535,driver<536 brand=nvidiartx,driver>=535,driver<536 brand=vapps,driver>=535,driver<536 brand=vpc,driver>=535,driver<536 brand=vcs,driver>=535,driver<536 brand=vws,driver>=535,driver<536 brand=cloudgaming,driver>=535,driver<536 brand=unknown,driver>=550,driver<551 brand=grid,driver>=550,driver<551 brand=tesla,driver>=550,driver<551 brand=nvidia,driver>=550,driver<551 brand=quadro,driver>=550,driver<551 brand=quadrortx,driver>=550,driver<551 brand=nvidiartx,driver>=550,driver<551 brand=vapps,driver>=550,driver<551 brand=vpc,driver>=550,driver<551 brand=vcs,driver>=550,driver<551 brand=vws,driver>=550,driver<551 brand=cloudgaming,driver>=550,driver<551 brand=unknown,driver>=560,driver<561 brand=grid,driver>=560,driver<561 brand=tesla,driver>=560,driver<561 brand=nvidia,driver>=560,driver<561 brand=quadro,driver>=560,driver<561 brand=quadrortx,driver>=560,driver<561 brand=nvidiartx,driver>=560,driver<561 brand=vapps,driver>=560,driver<561 brand=vpc,driver>=560,driver<561 brand=vcs,driver>=560,driver<561 brand=vws,driver>=560,driver<561 brand=cloudgaming,driver>=560,driver<561 brand=unknown,driver>=565,driver<566 brand=grid,driver>=565,driver<566 brand=tesla,driver>=565,driver<566 brand=nvidia,driver>=565,driver<566 brand=quadro,driver>=565,driver<566 brand=quadrortx,driver>=565,driver<566 brand=nvidiartx,driver>=565,driver<566 brand=vapps,driver>=565,driver<566 brand=vpc,driver>=565,driver<566 brand=vcs,driver>=565,driver<566 brand=vws,driver>=565,driver<566 brand=cloudgaming,driver>=565,driver<566 brand=unknown,driver>=570,driver<571 brand=grid,driver>=570,driver<571 brand=tesla,driver>=570,driver<571 brand=nvidia,driver>=570,driver<571 brand=quadro,driver>=570,driver<571 brand=quadrortx,driver>=570,driver<571 brand=nvidiartx,driver>=570,driver<571 brand=vapps,driver>=570,driver<571 brand=vpc,driver>=570,driver<571 brand=vcs,driver>=570,driver<571 brand=vws,driver>=570,driver<571 brand=cloudgaming,driver>=570,driver<571
TORCH_CUDA_ARCH_LIST=7.0 7.5 8.0 8.9 9.0 10.0 12.0
NVIDIA_DRIVER_CAPABILITIES=compute,utility
VLLM_USAGE_SOURCE=production-docker-image
CUDA_VERSION=12.9.1
VLLM_ENABLE_CUDA_COMPATIBILITY=0
LD_LIBRARY_PATH=/usr/local/nvidia/lib64:/usr/local/cuda/lib64:/usr/local/cuda/lib64
PYTORCH_NVML_BASED_CUDA_CHECK=1
TORCHINDUCTOR_COMPILE_THREADS=1
TORCHINDUCTOR_CACHE_DIR=/tmp/torchinductor_root```
</details>

🐛 Describe the bug

Run command

#!/bin/bash

# MiniMax-M2 Series Usage Guide
# https://docs.vllm.ai/projects/recipes/en/latest/MiniMax/MiniMax-M2.html

MODEL=MiniMaxAI/MiniMax-M2.5
HF_ENDPOINT=https://hf-mirror.com
NAME=minimax
API_KEY=openai

sudo docker stop $NAME > /dev/null 2>&1
sudo docker rm $NAME > /dev/null 2>&1

# wait for GPU release
sleep 5

# parallel
# requests in a single batch
# --max-num-seqs 256

sudo docker run \
    -d \
    --restart always \
    --runtime nvidia \
    --gpus all \
    --name $NAME \
    -e HF_ENDPOINT=$HF_ENDPOINT \
    -e 'NCCL_P2P_DISABLE=1' \
    -v /data/hf:/root/.cache/huggingface \
    -v $(pwd)/config:/config \
    -p 7035:8000 \
    --ipc=host \
    vllm/vllm-openai:nightly \
    $MODEL \
    --api-key $API_KEY \
    --gpu-memory-utilization 0.85 \
    --tensor-parallel-size 4 \
    --tool-call-parser minimax_m2 \
    --reasoning-parser minimax_m2_append_think \
    --enable-auto-tool-choice \
    --trust-remote-code \
    --max-num-seqs 256 \
    --kv-offloading-backend native \
    --kv-offloading-size 512 \
    --disable-hybrid-kv-cache-manager \
    --enable-chunked-prefill \
    --enable-prefix-caching \
    --compilation-config '{"cudagraph_mode": "PIECEWISE"}'

Crash logs

(APIServer pid=1) INFO 03-30 05:52:17 [metrics.py:103] KV Transfer metrics: GPU_to_CPU_total_bytes=5578817536, GPU_to_CPU_total_time=0.5537267196178438, CPU_to_GPU_total_bytes=26337869824, CPU_to_GPU_total_time=2.0508480224609373
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 200 OK
(APIServer pid=1) INFO:     172.17.0.1:37668 - "POST /v1/messages?beta=true HTTP/1.1" 200 OK
(APIServer pid=1) INFO:     172.17.0.1:33254 - "POST /v1/chat/completions HTTP/1.1" 200 OK
(APIServer pid=1) INFO 03-30 05:52:27 [loggers.py:259] Engine 000: Avg prompt throughput: 26.1 tokens/s, Avg generation throughput: 18.7 tokens/s, Running: 1 reqs, Waiting: 2 reqs, GPU KV cache usage: 12.4%, Prefix cache hit rate: 68.1%, External prefix cache hit rate: 56.6%
(APIServer pid=1) INFO 03-30 05:52:27 [metrics.py:103] KV Transfer metrics: CPU_to_GPU_total_bytes=7090339840, CPU_to_GPU_total_time=0.5460842066407204, GPU_to_CPU_total_bytes=5257822208, GPU_to_CPU_total_time=0.5265549793243409
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] AsyncLLM output_handler failed.
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [async_llm.py:707] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Error in message stream converter.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 566, in message_stream_converter
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     origin_chunk = ChatCompletionStreamResponse.model_validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/pydantic/main.py", line 766, in model_validate_json
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     return cls.__pydantic_validator__.validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] pydantic_core._pydantic_core.ValidationError: 2 validation errors for ChatCompletionStreamResponse
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] model
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] choices
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Error in message stream converter.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 566, in message_stream_converter
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     origin_chunk = ChatCompletionStreamResponse.model_validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   File "/usr/local/lib/python3.12/dist-packages/pydantic/main.py", line 766, in model_validate_json
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     return cls.__pydantic_validator__.validate_json(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] pydantic_core._pydantic_core.ValidationError: 2 validation errors for ChatCompletionStreamResponse
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] model
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764] choices
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]   Field required [type=missing, input_value={'error': {'message': 'Co...am': None, 'code': 400}}, input_type=dict]
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:764]     For further information visit https://errors.pydantic.dev/2.12/v/missing
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Error in chat completion stream generator.
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 657, in chat_completion_stream_generator
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     async for res in result_generator:
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 582, in generate
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     out = q.get_nowait() or await q.get()
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]                             ^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/output_processor.py", line 85, in get
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise output
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 700, in output_handler
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     logger_ref[0].record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1316, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     stat_logger.record(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/metrics/loggers.py", line 1120, in record
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     self.counter_prompt_tokens_by_source[source][engine_idx].inc(
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]   File "/usr/local/lib/python3.12/dist-packages/prometheus_client/metrics.py", line 339, in inc
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333]     raise ValueError('Counters can only be incremented by non-negative amounts.')
(APIServer pid=1) ERROR 03-30 05:52:30 [serving.py:1333] ValueError: Counters can only be incremented by non-negative amounts.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:30 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Error in create_messages: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] Traceback (most recent call last):
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/api_router.py", line 70, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await handler.create_messages(request, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/anthropic/serving.py", line 407, in create_messages
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     generator = await self.create_chat_completion(chat_req, raw_request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 305, in create_chat_completion
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     result = await self.render_chat_request(request)
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/chat_completion/serving.py", line 204, in render_chat_request
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72]     raise self.engine_client.dead_error
(APIServer pid=1) ERROR 03-30 05:52:31 [api_router.py:72] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
(APIServer pid=1) INFO:     172.17.0.1:57192 - "POST /v1/messages?beta=true HTTP/1.1" 500 Internal Server Error
(APIServer pid=1) INFO:     Shutting down
(APIServer pid=1) INFO:     Waiting for application shutdown.
(APIServer pid=1) INFO:     Application shutdown complete.
(APIServer pid=1) INFO:     Finished server process [1]
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1217] Shutdown initiated (timeout=0)
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1222] Aborting 3 requests
(EngineCore_DP0 pid=239) INFO 03-30 05:52:32 [core.py:1240] Shutdown complete
(Worker pid=439) (Worker_TP2 pid=439) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=440) (Worker_TP3 pid=440) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=437) (Worker_TP0 pid=437) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=438) (Worker_TP1 pid=438) INFO 03-30 05:52:32 [multiproc_executor.py:759] Parent process exited, terminating worker queues
(Worker pid=439) (Worker_TP2 pid=439) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=440) (Worker_TP3 pid=440) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=437) (Worker_TP0 pid=437) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.
(Worker pid=438) (Worker_TP1 pid=438) INFO 03-30 05:52:32 [multiproc_executor.py:854] WorkerProc shutting down.

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extent analysis

Fix Plan

The error message ValueError: Counters can only be incremented by non-negative amounts. suggests that there is an issue with the way metrics are being recorded in the application.

To fix this issue, we need to ensure that the values being passed to the inc method of the counter are non-negative.

Here are the steps to fix the issue:

  • Check the values being passed to the inc method: Before calling the inc method, check if the value is non-negative. If the value is negative, either do not increment the counter or handle the negative value in a way that makes sense for your application.
  • Modify the record method in loggers.py: Modify the record method in loggers.py to handle negative values. This could involve ignoring negative values, throwing an exception, or handling them in some other way that makes sense for your application.

Example code to check for non-negative values before incrementing the counter:

if value >= 0:
    self.counter_prompt_tokens_by_source[source][engine_idx].inc(value)
else:
    # Handle negative value
    print(f"Negative value {value} encountered. Not incrementing counter.")

Example code to modify the record method in loggers.py to handle negative values:

def record(self, value):
    if value < 0:
        # Handle negative value
        print(f"Negative value {value} encountered. Not recording.")
    else:
        self.counter_prompt_tokens_by_source[source][engine_idx].inc(value)

Verification

To verify that the fix worked, run the application and check for the error message ValueError: Counters can only be incremented by non-negative amounts. If the error message is no longer present, the fix was successful.

Extra Tips

  • Make sure to test the application thoroughly after applying the fix to ensure that it is working as expected.
  • Consider adding logging or other debugging statements to help diagnose any future issues.
  • If the issue persists after applying the fix, consider seeking further assistance from the application's support team or community.

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