vllm - ✅(Solved) Fix [Bug]: 'placeholder_block_size' is not defined [1 pull requests, 1 participants]

vllm2026-03-17 22:37:20

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vllm-project/vllm#37350•Fetched 2026-04-08 00:53:22

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Error Message

(EngineCore pid=207) DEBUG 03-17 22:55:01 [model_executor/models/qwen3_next.py:776] GDN prefill kernel warmup (T=64) completed for layer language_model.model.layers.38.linear_attn (EngineCore pid=207) INFO 03-17 22:55:01 [compilation/monitor.py:76] Initial profiling/warmup run took 158.40 s (APIServer pid=1) DEBUG 03-17 22:55:05 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start. (APIServer pid=1) DEBUG 03-17 22:55:15 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start. (EngineCore pid=207) INFO 03-17 22:55:16 [v1/core/kv_cache_utils.py:826] Overriding num_gpu_blocks=0 with num_gpu_blocks_override=512 (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] EngineCore failed to start. (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] Traceback (most recent call last): (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return func(*args, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in init (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] super().init( (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in init (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] kv_cache_config = self._initialize_kv_caches(vllm_config) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return func(*args, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] available_gpu_memory = self.model_executor.determine_available_memory() (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return self.collective_rpc("determine_available_memory") (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] result = run_method(self.driver_worker, method, args, kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return func(*args, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return func(*args, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory() (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] return func(*args, **kwargs) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] self._init_minimal_kv_cache_for_profiling() (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] self.initialize_kv_cache(minimal_config) (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] block_sizes=[placeholder_block_size], (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] ^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] NameError: name 'placeholder_block_size' is not defined (EngineCore pid=207) Process EngineCore: (EngineCore pid=207) Traceback (most recent call last): (EngineCore pid=207) File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap (EngineCore pid=207) self.run() (EngineCore pid=207) File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run (EngineCore pid=207) self._target(*self._args, **self._kwargs) (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1103, in run_engine_core (EngineCore pid=207) raise e (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core (EngineCore pid=207) engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore pid=207) return func(*args, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in init (EngineCore pid=207) super().init( (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in init (EngineCore pid=207) kv_cache_config = self._initialize_kv_caches(vllm_config) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore pid=207) return func(*args, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches (EngineCore pid=207) available_gpu_memory = self.model_executor.determine_available_memory() (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory (EngineCore pid=207) return self.collective_rpc("determine_available_memory") (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc (EngineCore pid=207) result = run_method(self.driver_worker, method, args, kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method (EngineCore pid=207) return func(*args, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context (EngineCore pid=207) return func(*args, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory (EngineCore pid=207) cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory() (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context (EngineCore pid=207) return func(*args, **kwargs) (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory (EngineCore pid=207) self._init_minimal_kv_cache_for_profiling() (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling (EngineCore pid=207) self.initialize_kv_cache(minimal_config) (EngineCore pid=207) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache (EngineCore pid=207) block_sizes=[placeholder_block_size], (EngineCore pid=207) ^^^^^^^^^^^^^^^^^^^^^^ (EngineCore pid=207) NameError: name 'placeholder_block_size' is not defined [rank0]:[W317 22:55:17.937545770 ProcessGroupNCCL.cpp:1553] Warning: WARNING: destroy_process_group() was not called before program exit, which can leak resources. For more info, please see https://pytorch.org/docs/stable/distributed.html#shutdown (function operator()) (APIServer pid=1) Traceback (most recent call last): (APIServer pid=1) File "/usr/local/bin/vllm", line 10, in <module> (APIServer pid=1) sys.exit(main()) (APIServer pid=1) ^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/main.py", line 75, in main (APIServer pid=1) args.dispatch_function(args) (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/serve.py", line 118, in cmd (APIServer pid=1) uvloop.run(run_server(args)) (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/uvloop/init.py", line 96, in run (APIServer pid=1) return __asyncio.run( (APIServer pid=1) ^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run (APIServer pid=1) return runner.run(main) (APIServer pid=1) ^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run (APIServer pid=1) return self._loop.run_until_complete(task) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "uvloop/loop.pyx", line 1518, in uvloop.loop.Loop.run_until_complete (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/uvloop/init.py", line 48, in wrapper (APIServer pid=1) return await main (APIServer pid=1) ^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 675, in run_server (APIServer pid=1) await run_server_worker(listen_address, sock, args, **uvicorn_kwargs) (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 689, in run_server_worker (APIServer pid=1) async with build_async_engine_client( (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/lib/python3.12/contextlib.py", line 210, in aenter (APIServer pid=1) return await anext(self.gen) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 104, in build_async_engine_client (APIServer pid=1) async with build_async_engine_client_from_engine_args( (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/lib/python3.12/contextlib.py", line 210, in aenter (APIServer pid=1) return await anext(self.gen) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 145, in build_async_engine_client_from_engine_args (APIServer pid=1) async_llm = AsyncLLM.from_vllm_config( (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 225, in from_vllm_config (APIServer pid=1) return cls( (APIServer pid=1) ^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 154, in init (APIServer pid=1) self.engine_core = EngineCoreClient.make_async_mp_client( (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (APIServer pid=1) return func(*args, **kwargs) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 128, in make_async_mp_client (APIServer pid=1) return AsyncMPClient(*client_args) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (APIServer pid=1) return func(*args, **kwargs) (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 924, in init (APIServer pid=1) super().init( (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 583, in init (APIServer pid=1) with launch_core_engines( (APIServer pid=1) ^^^^^^^^^^^^^^^^^^^^ (APIServer pid=1) File "/usr/lib/python3.12/contextlib.py", line 144, in exit (APIServer pid=1) next(self.gen) (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 972, in launch_core_engines (APIServer pid=1) wait_for_engine_startup( (APIServer pid=1) File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 1031, in wait_for_engine_startup (APIServer pid=1) raise RuntimeError( (APIServer pid=1) RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {}

Root Cause

Error msg:

(EngineCore pid=207) DEBUG 03-17 22:55:01 [model_executor/models/qwen3_next.py:776] GDN prefill kernel warmup (T=64) completed for layer language_model.model.layers.38.linear_attn
(EngineCore pid=207) INFO 03-17 22:55:01 [compilation/monitor.py:76] Initial profiling/warmup run took 158.40 s
(APIServer pid=1) DEBUG 03-17 22:55:05 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(APIServer pid=1) DEBUG 03-17 22:55:15 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(EngineCore pid=207) INFO 03-17 22:55:16 [v1/core/kv_cache_utils.py:826] Overriding num_gpu_blocks=0 with num_gpu_blocks_override=512
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] EngineCore failed to start.
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] Traceback (most recent call last):
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     super().__init__(
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     block_sizes=[placeholder_block_size],
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] NameError: name 'placeholder_block_size' is not defined
(EngineCore pid=207) Process EngineCore:
(EngineCore pid=207) Traceback (most recent call last):
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap
(EngineCore pid=207)     self.run()
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run
(EngineCore pid=207)     self._target(*self._args, **self._kwargs)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1103, in run_engine_core
(EngineCore pid=207)     raise e
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207)     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207)                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207)     super().__init__(
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207)     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207)                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207)     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207)                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207)     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207)     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207)              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207)     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207)                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207)     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207)     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207)     block_sizes=[placeholder_block_size],
(EngineCore pid=207)                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) NameError: name 'placeholder_block_size' is not defined
[rank0]:[W317 22:55:17.937545770 ProcessGroupNCCL.cpp:1553] Warning: WARNING: destroy_process_group() was not called before program exit, which can leak resources. For more info, please see https://pytorch.org/docs/stable/distributed.html#shutdown (function operator())
(APIServer pid=1) Traceback (most recent call last):
(APIServer pid=1)   File "/usr/local/bin/vllm", line 10, in <module>
(APIServer pid=1)     sys.exit(main())
(APIServer pid=1)              ^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/main.py", line 75, in main
(APIServer pid=1)     args.dispatch_function(args)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/serve.py", line 118, in cmd
(APIServer pid=1)     uvloop.run(run_server(args))
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 96, in run
(APIServer pid=1)     return __asyncio.run(
(APIServer pid=1)            ^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run
(APIServer pid=1)     return runner.run(main)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
(APIServer pid=1)     return self._loop.run_until_complete(task)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "uvloop/loop.pyx", line 1518, in uvloop.loop.Loop.run_until_complete
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 48, in wrapper
(APIServer pid=1)     return await main
(APIServer pid=1)            ^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 675, in run_server
(APIServer pid=1)     await run_server_worker(listen_address, sock, args, **uvicorn_kwargs)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 689, in run_server_worker
(APIServer pid=1)     async with build_async_engine_client(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 104, in build_async_engine_client
(APIServer pid=1)     async with build_async_engine_client_from_engine_args(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 145, in build_async_engine_client_from_engine_args
(APIServer pid=1)     async_llm = AsyncLLM.from_vllm_config(
(APIServer pid=1)                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 225, in from_vllm_config
(APIServer pid=1)     return cls(
(APIServer pid=1)            ^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 154, in __init__
(APIServer pid=1)     self.engine_core = EngineCoreClient.make_async_mp_client(
(APIServer pid=1)                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 128, in make_async_mp_client
(APIServer pid=1)     return AsyncMPClient(*client_args)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 924, in __init__
(APIServer pid=1)     super().__init__(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 583, in __init__
(APIServer pid=1)     with launch_core_engines(
(APIServer pid=1)          ^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 144, in __exit__
(APIServer pid=1)     next(self.gen)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 972, in launch_core_engines
(APIServer pid=1)     wait_for_engine_startup(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 1031, in wait_for_engine_startup
(APIServer pid=1)     raise RuntimeError(
(APIServer pid=1) RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {}

Fix Action

Fix / Workaround

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

Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 48 bits physical, 48 bits virtual Byte Order: Little Endian CPU(s): 32 On-line CPU(s) list: 0-31 Vendor ID: AuthenticAMD Model name: AMD Ryzen 9 9950X 16-Core Processor CPU family: 26 Model: 68 Thread(s) per core: 2 Core(s) per socket: 16 Socket(s): 1 Stepping: 0 Frequency boost: enabled CPU(s) scaling MHz: 57% CPU max MHz: 5756.4521 CPU min MHz: 624.1940 BogoMIPS: 8599.98 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpuid_fault cpb cat_l3 cdp_l3 hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk avx_vnni avx512_bf16 clzero irperf xsaveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid bus_lock_detect movdiri movdir64b overflow_recov succor smca fsrm avx512_vp2intersect flush_l1d amd_lbr_pmc_freeze Virtualization: AMD-V L1d cache: 768 KiB (16 instances) L1i cache: 512 KiB (16 instances) L2 cache: 16 MiB (16 instances) L3 cache: 64 MiB (2 instances) NUMA node(s): 1 NUMA node0 CPU(s): 0-31 Vulnerability Gather data sampling: Not affected Vulnerability Ghostwrite: Not affected Vulnerability Indirect target selection: Not affected Vulnerability Itlb multihit: Not affected Vulnerability L1tf: Not affected Vulnerability Mds: Not affected Vulnerability Meltdown: Not affected Vulnerability Mmio stale data: Not affected Vulnerability Old microcode: Not affected Vulnerability Reg file data sampling: Not affected Vulnerability Retbleed: Not affected Vulnerability Spec rstack overflow: Mitigation; IBPB on VMEXIT only Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization Vulnerability Spectre v2: Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on; PBRSB-eIBRS Not affected; BHI Not affected Vulnerability Srbds: Not affected Vulnerability Tsa: Not affected Vulnerability Tsx async abort: Not affected Vulnerability Vmscape: Mitigation; IBPB on VMEXIT

Error msg:

(EngineCore pid=207) DEBUG 03-17 22:55:01 [model_executor/models/qwen3_next.py:776] GDN prefill kernel warmup (T=64) completed for layer language_model.model.layers.38.linear_attn
(EngineCore pid=207) INFO 03-17 22:55:01 [compilation/monitor.py:76] Initial profiling/warmup run took 158.40 s
(APIServer pid=1) DEBUG 03-17 22:55:05 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(APIServer pid=1) DEBUG 03-17 22:55:15 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(EngineCore pid=207) INFO 03-17 22:55:16 [v1/core/kv_cache_utils.py:826] Overriding num_gpu_blocks=0 with num_gpu_blocks_override=512
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] EngineCore failed to start.
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] Traceback (most recent call last):
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     super().__init__(
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     block_sizes=[placeholder_block_size],
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] NameError: name 'placeholder_block_size' is not defined
(EngineCore pid=207) Process EngineCore:
(EngineCore pid=207) Traceback (most recent call last):
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap
(EngineCore pid=207)     self.run()
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run
(EngineCore pid=207)     self._target(*self._args, **self._kwargs)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1103, in run_engine_core
(EngineCore pid=207)     raise e
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207)     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207)                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207)     super().__init__(
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207)     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207)                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207)     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207)                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207)     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207)     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207)              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207)     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207)                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207)     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207)     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207)     block_sizes=[placeholder_block_size],
(EngineCore pid=207)                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) NameError: name 'placeholder_block_size' is not defined
[rank0]:[W317 22:55:17.937545770 ProcessGroupNCCL.cpp:1553] Warning: WARNING: destroy_process_group() was not called before program exit, which can leak resources. For more info, please see https://pytorch.org/docs/stable/distributed.html#shutdown (function operator())
(APIServer pid=1) Traceback (most recent call last):
(APIServer pid=1)   File "/usr/local/bin/vllm", line 10, in <module>
(APIServer pid=1)     sys.exit(main())
(APIServer pid=1)              ^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/main.py", line 75, in main
(APIServer pid=1)     args.dispatch_function(args)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/serve.py", line 118, in cmd
(APIServer pid=1)     uvloop.run(run_server(args))
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 96, in run
(APIServer pid=1)     return __asyncio.run(
(APIServer pid=1)            ^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run
(APIServer pid=1)     return runner.run(main)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
(APIServer pid=1)     return self._loop.run_until_complete(task)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "uvloop/loop.pyx", line 1518, in uvloop.loop.Loop.run_until_complete
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 48, in wrapper
(APIServer pid=1)     return await main
(APIServer pid=1)            ^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 675, in run_server
(APIServer pid=1)     await run_server_worker(listen_address, sock, args, **uvicorn_kwargs)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 689, in run_server_worker
(APIServer pid=1)     async with build_async_engine_client(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 104, in build_async_engine_client
(APIServer pid=1)     async with build_async_engine_client_from_engine_args(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 145, in build_async_engine_client_from_engine_args
(APIServer pid=1)     async_llm = AsyncLLM.from_vllm_config(
(APIServer pid=1)                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 225, in from_vllm_config
(APIServer pid=1)     return cls(
(APIServer pid=1)            ^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 154, in __init__
(APIServer pid=1)     self.engine_core = EngineCoreClient.make_async_mp_client(
(APIServer pid=1)                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 128, in make_async_mp_client
(APIServer pid=1)     return AsyncMPClient(*client_args)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 924, in __init__
(APIServer pid=1)     super().__init__(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 583, in __init__
(APIServer pid=1)     with launch_core_engines(
(APIServer pid=1)          ^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 144, in __exit__
(APIServer pid=1)     next(self.gen)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 972, in launch_core_engines
(APIServer pid=1)     wait_for_engine_startup(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 1031, in wait_for_engine_startup
(APIServer pid=1)     raise RuntimeError(
(APIServer pid=1) RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {}

PR fix notes

PR #37622: [Bugfix] Fix Step3 pipeline parallel KeyError for residual tensor

Repository: vllm-project/vllm
Author: JMonde
State: open | merged: False
Link: https://github.com/vllm-project/vllm/pull/37622

Description (problem / solution / changelog)

Summary

This PR fixes a KeyError: 'residual' that occurs when running Step3 models (e.g., Qwen3.5) with pipeline parallel enabled.

Root Cause

The Step3TextModel.make_empty_intermediate_tensors_factory() was only creating tensors for ["hidden_states"], but the forward() method expects both hidden_states and residual in intermediate_tensors for non-first pipeline ranks.

When running with pipeline parallel:

First rank: sets residual = None
Non-first ranks: tries to access intermediate_tensors["residual"] → KeyError

Fix

Added "residual" to the list of keys in make_empty_intermediate_tensors_factory():

# Before
self.make_empty_intermediate_tensors = make_empty_intermediate_tensors_factory(
    ["hidden_states"], config.hidden_size
)

# After  
self.make_empty_intermediate_tensors = make_empty_intermediate_tensors_factory(
    ["hidden_states", "residual"], config.hidden_size
)

Related Issues

Fixes #37543

Note on Issue #37350

During investigation, I also checked issue #37350 (placeholder_block_size is not defined). This issue has already been fixed in the current codebase - the variable is properly defined at line 597-612 in vllm/v1/worker/gpu_model_runner.py.

Testing

This fix follows the same pattern used in other models like step1.py which already includes both keys:

# vllm/model_executor/models/step1.py (line 312-315)
self.make_empty_intermediate_tensors = make_empty_intermediate_tensors_factory(
    ["hidden_states", "residual"],
    config.hidden_size,
)

Models with similar pipeline parallel patterns that correctly handle residuals:

step1.py: ✅ Already has both keys
step3p5.py: ✅ Correctly only uses hidden_states (doesn't use residual in forward)
step3_text.py: 🔧 Fixed in this PR

Changed files

vllm/model_executor/models/step3_text.py (modified, +1/-1)

Code Example

Collecting environment information...
uv is set
==============================
        System Info
==============================
OS                           : Ubuntu Resolute Raccoon (development branch) (x86_64)
GCC version                  : (Ubuntu 15.2.0-15ubuntu1) 15.2.0
Clang version                : 21.1.8 (4ubuntu2)
CMake version                : version 4.2.3
Libc version                 : glibc-2.42

==============================
       PyTorch Info
==============================
PyTorch version              : 2.10.0+cu128
Is debug build               : False
CUDA used to build PyTorch   : 12.8
ROCM used to build PyTorch   : N/A

==============================
      Python Environment
==============================
Python version               : 3.12.13 (main, Mar  3 2026, 14:59:34) [Clang 21.1.4 ] (64-bit runtime)
Python platform              : Linux-6.19.0-9-generic-x86_64-with-glibc2.42

==============================
       CUDA / GPU Info
==============================
Is CUDA available            : True
CUDA runtime version         : 12.4.131
CUDA_MODULE_LOADING set to   : 
GPU models and configuration : GPU 0: NVIDIA GeForce RTX 5080
Nvidia driver version        : 590.48.01
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:                           48 bits physical, 48 bits virtual
Byte Order:                              Little Endian
CPU(s):                                  32
On-line CPU(s) list:                     0-31
Vendor ID:                               AuthenticAMD
Model name:                              AMD Ryzen 9 9950X 16-Core Processor
CPU family:                              26
Model:                                   68
Thread(s) per core:                      2
Core(s) per socket:                      16
Socket(s):                               1
Stepping:                                0
Frequency boost:                         enabled
CPU(s) scaling MHz:                      57%
CPU max MHz:                             5756.4521
CPU min MHz:                             624.1940
BogoMIPS:                                8599.98
Flags:                                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpuid_fault cpb cat_l3 cdp_l3 hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk avx_vnni avx512_bf16 clzero irperf xsaveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid bus_lock_detect movdiri movdir64b overflow_recov succor smca fsrm avx512_vp2intersect flush_l1d amd_lbr_pmc_freeze
Virtualization:                          AMD-V
L1d cache:                               768 KiB (16 instances)
L1i cache:                               512 KiB (16 instances)
L2 cache:                                16 MiB (16 instances)
L3 cache:                                64 MiB (2 instances)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-31
Vulnerability Gather data sampling:      Not affected
Vulnerability Ghostwrite:                Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Old microcode:             Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Mitigation; IBPB on VMEXIT only
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on; PBRSB-eIBRS Not affected; BHI Not affected
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Mitigation; IBPB on VMEXIT

==============================
Versions of relevant libraries
==============================
[pip3] flashinfer-python==0.6.6
[pip3] numpy==2.2.6
[pip3] nvidia-cublas==13.1.0.3
[pip3] nvidia-cublas-cu12==12.8.4.1
[pip3] nvidia-cuda-cupti==13.0.85
[pip3] nvidia-cuda-cupti-cu12==12.8.90
[pip3] nvidia-cuda-nvrtc==13.0.88
[pip3] nvidia-cuda-nvrtc-cu12==12.8.93
[pip3] nvidia-cuda-runtime==13.0.96
[pip3] nvidia-cuda-runtime-cu12==12.8.90
[pip3] nvidia-cudnn-cu12==9.10.2.21
[pip3] nvidia-cudnn-cu13==9.19.0.56
[pip3] nvidia-cudnn-frontend==1.18.0
[pip3] nvidia-cufft==12.0.0.61
[pip3] nvidia-cufft-cu12==11.3.3.83
[pip3] nvidia-cufile==1.15.1.6
[pip3] nvidia-cufile-cu12==1.13.1.3
[pip3] nvidia-curand==10.4.0.35
[pip3] nvidia-curand-cu12==10.3.9.90
[pip3] nvidia-cusolver==12.0.4.66
[pip3] nvidia-cusolver-cu12==11.7.3.90
[pip3] nvidia-cusparse==12.6.3.3
[pip3] nvidia-cusparse-cu12==12.5.8.93
[pip3] nvidia-cusparselt-cu12==0.7.1
[pip3] nvidia-cusparselt-cu13==0.8.0
[pip3] nvidia-cutlass-dsl==4.4.2
[pip3] nvidia-cutlass-dsl-libs-base==4.4.2
[pip3] nvidia-ml-py==13.590.48
[pip3] nvidia-nccl-cu12==2.27.5
[pip3] nvidia-nccl-cu13==2.29.3
[pip3] nvidia-nvjitlink==13.0.88
[pip3] nvidia-nvjitlink-cu12==12.8.93
[pip3] nvidia-nvshmem-cu12==3.4.5
[pip3] nvidia-nvshmem-cu13==3.4.5
[pip3] nvidia-nvtx==13.0.85
[pip3] nvidia-nvtx-cu12==12.8.90
[pip3] pyzmq==27.1.0
[pip3] torch==2.10.0
[pip3] torch-c-dlpack-ext==0.1.5
[pip3] torchaudio==2.10.0
[pip3] torchvision==0.25.0
[pip3] transformers==4.57.6
[pip3] triton==3.6.0+git9844da95
[conda] Could not collect

==============================
         vLLM Info
==============================
ROCM Version                 : Could not collect
vLLM Version                 : 0.17.2rc1.dev11+g293f036e6.d20260317 (git sha: 293f036e6, date: 20260317)
vLLM Build Flags:
  CUDA Archs: Not Set; ROCm: Disabled
GPU Topology:
  	GPU0	CPU Affinity	NUMA Affinity	GPU NUMA ID
GPU0	 X 	0-31	0		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
==============================
PYTORCH_NVML_BASED_CUDA_CHECK=1
TORCHINDUCTOR_COMPILE_THREADS=1
TORCHINDUCTOR_CACHE_DIR=/tmp/torchinductor_awm

---

(EngineCore pid=207) DEBUG 03-17 22:55:01 [model_executor/models/qwen3_next.py:776] GDN prefill kernel warmup (T=64) completed for layer language_model.model.layers.38.linear_attn
(EngineCore pid=207) INFO 03-17 22:55:01 [compilation/monitor.py:76] Initial profiling/warmup run took 158.40 s
(APIServer pid=1) DEBUG 03-17 22:55:05 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(APIServer pid=1) DEBUG 03-17 22:55:15 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(EngineCore pid=207) INFO 03-17 22:55:16 [v1/core/kv_cache_utils.py:826] Overriding num_gpu_blocks=0 with num_gpu_blocks_override=512
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] EngineCore failed to start.
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] Traceback (most recent call last):
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     super().__init__(
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     block_sizes=[placeholder_block_size],
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] NameError: name 'placeholder_block_size' is not defined
(EngineCore pid=207) Process EngineCore:
(EngineCore pid=207) Traceback (most recent call last):
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap
(EngineCore pid=207)     self.run()
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run
(EngineCore pid=207)     self._target(*self._args, **self._kwargs)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1103, in run_engine_core
(EngineCore pid=207)     raise e
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207)     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207)                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207)     super().__init__(
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207)     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207)                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207)     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207)                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207)     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207)     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207)              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207)     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207)                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207)     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207)     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207)     block_sizes=[placeholder_block_size],
(EngineCore pid=207)                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) NameError: name 'placeholder_block_size' is not defined
[rank0]:[W317 22:55:17.937545770 ProcessGroupNCCL.cpp:1553] Warning: WARNING: destroy_process_group() was not called before program exit, which can leak resources. For more info, please see https://pytorch.org/docs/stable/distributed.html#shutdown (function operator())
(APIServer pid=1) Traceback (most recent call last):
(APIServer pid=1)   File "/usr/local/bin/vllm", line 10, in <module>
(APIServer pid=1)     sys.exit(main())
(APIServer pid=1)              ^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/main.py", line 75, in main
(APIServer pid=1)     args.dispatch_function(args)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/serve.py", line 118, in cmd
(APIServer pid=1)     uvloop.run(run_server(args))
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 96, in run
(APIServer pid=1)     return __asyncio.run(
(APIServer pid=1)            ^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run
(APIServer pid=1)     return runner.run(main)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
(APIServer pid=1)     return self._loop.run_until_complete(task)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "uvloop/loop.pyx", line 1518, in uvloop.loop.Loop.run_until_complete
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 48, in wrapper
(APIServer pid=1)     return await main
(APIServer pid=1)            ^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 675, in run_server
(APIServer pid=1)     await run_server_worker(listen_address, sock, args, **uvicorn_kwargs)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 689, in run_server_worker
(APIServer pid=1)     async with build_async_engine_client(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 104, in build_async_engine_client
(APIServer pid=1)     async with build_async_engine_client_from_engine_args(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 145, in build_async_engine_client_from_engine_args
(APIServer pid=1)     async_llm = AsyncLLM.from_vllm_config(
(APIServer pid=1)                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 225, in from_vllm_config
(APIServer pid=1)     return cls(
(APIServer pid=1)            ^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 154, in __init__
(APIServer pid=1)     self.engine_core = EngineCoreClient.make_async_mp_client(
(APIServer pid=1)                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 128, in make_async_mp_client
(APIServer pid=1)     return AsyncMPClient(*client_args)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 924, in __init__
(APIServer pid=1)     super().__init__(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 583, in __init__
(APIServer pid=1)     with launch_core_engines(
(APIServer pid=1)          ^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 144, in __exit__
(APIServer pid=1)     next(self.gen)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 972, in launch_core_engines
(APIServer pid=1)     wait_for_engine_startup(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 1031, in wait_for_engine_startup
(APIServer pid=1)     raise RuntimeError(
(APIServer pid=1) RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {}

---

git clone https://github.com/vllm-project/vllm/
cd vllm

podman build --build-arg CUDA_VERSION=13.0.1 --build-arg BUILD_BASE_IMAGE=nvidia/cuda:13.0.1-devel-ubuntu22.04 --build-arg max_jobs=8 --build-arg nvcc_threads=2 --build-arg RUN_WHEEL_CHECK=false --build-arg torch_cuda_arch_list='9.0 10.0+PTX' --tag vllm/vllm-openai --target vllm-openai -f docker/Dockerfile .

podman run -e "VLLM_LOGGING_LEVEL=DEBUG" -e "VLLM_TRACE_FUNCTION=1" --device nvidia.com/gpu=all -v ~/.cache/huggingface:/root/.cache/huggingface -p 8080:8000 --ipc=host vllm/vllm-openai --model Qwen/Qwen3.5-35B-A3B-GPTQ-Int4 --dtype auto --api-key token-coiano --cpu-offload-gb 56 --gpu-memory-utilization 0.97 --tensor-parallel-size 1

RAW_BUFFERClick to expand / collapse

Your current environment

<details> <summary>The output of <code>python collect_env.py</code></summary>

Collecting environment information...
uv is set
==============================
        System Info
==============================
OS                           : Ubuntu Resolute Raccoon (development branch) (x86_64)
GCC version                  : (Ubuntu 15.2.0-15ubuntu1) 15.2.0
Clang version                : 21.1.8 (4ubuntu2)
CMake version                : version 4.2.3
Libc version                 : glibc-2.42

==============================
       PyTorch Info
==============================
PyTorch version              : 2.10.0+cu128
Is debug build               : False
CUDA used to build PyTorch   : 12.8
ROCM used to build PyTorch   : N/A

==============================
      Python Environment
==============================
Python version               : 3.12.13 (main, Mar  3 2026, 14:59:34) [Clang 21.1.4 ] (64-bit runtime)
Python platform              : Linux-6.19.0-9-generic-x86_64-with-glibc2.42

==============================
       CUDA / GPU Info
==============================
Is CUDA available            : True
CUDA runtime version         : 12.4.131
CUDA_MODULE_LOADING set to   : 
GPU models and configuration : GPU 0: NVIDIA GeForce RTX 5080
Nvidia driver version        : 590.48.01
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:                           48 bits physical, 48 bits virtual
Byte Order:                              Little Endian
CPU(s):                                  32
On-line CPU(s) list:                     0-31
Vendor ID:                               AuthenticAMD
Model name:                              AMD Ryzen 9 9950X 16-Core Processor
CPU family:                              26
Model:                                   68
Thread(s) per core:                      2
Core(s) per socket:                      16
Socket(s):                               1
Stepping:                                0
Frequency boost:                         enabled
CPU(s) scaling MHz:                      57%
CPU max MHz:                             5756.4521
CPU min MHz:                             624.1940
BogoMIPS:                                8599.98
Flags:                                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpuid_fault cpb cat_l3 cdp_l3 hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local user_shstk avx_vnni avx512_bf16 clzero irperf xsaveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid bus_lock_detect movdiri movdir64b overflow_recov succor smca fsrm avx512_vp2intersect flush_l1d amd_lbr_pmc_freeze
Virtualization:                          AMD-V
L1d cache:                               768 KiB (16 instances)
L1i cache:                               512 KiB (16 instances)
L2 cache:                                16 MiB (16 instances)
L3 cache:                                64 MiB (2 instances)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-31
Vulnerability Gather data sampling:      Not affected
Vulnerability Ghostwrite:                Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Old microcode:             Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Mitigation; IBPB on VMEXIT only
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; Enhanced / Automatic IBRS; IBPB conditional; STIBP always-on; PBRSB-eIBRS Not affected; BHI Not affected
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Mitigation; IBPB on VMEXIT

==============================
Versions of relevant libraries
==============================
[pip3] flashinfer-python==0.6.6
[pip3] numpy==2.2.6
[pip3] nvidia-cublas==13.1.0.3
[pip3] nvidia-cublas-cu12==12.8.4.1
[pip3] nvidia-cuda-cupti==13.0.85
[pip3] nvidia-cuda-cupti-cu12==12.8.90
[pip3] nvidia-cuda-nvrtc==13.0.88
[pip3] nvidia-cuda-nvrtc-cu12==12.8.93
[pip3] nvidia-cuda-runtime==13.0.96
[pip3] nvidia-cuda-runtime-cu12==12.8.90
[pip3] nvidia-cudnn-cu12==9.10.2.21
[pip3] nvidia-cudnn-cu13==9.19.0.56
[pip3] nvidia-cudnn-frontend==1.18.0
[pip3] nvidia-cufft==12.0.0.61
[pip3] nvidia-cufft-cu12==11.3.3.83
[pip3] nvidia-cufile==1.15.1.6
[pip3] nvidia-cufile-cu12==1.13.1.3
[pip3] nvidia-curand==10.4.0.35
[pip3] nvidia-curand-cu12==10.3.9.90
[pip3] nvidia-cusolver==12.0.4.66
[pip3] nvidia-cusolver-cu12==11.7.3.90
[pip3] nvidia-cusparse==12.6.3.3
[pip3] nvidia-cusparse-cu12==12.5.8.93
[pip3] nvidia-cusparselt-cu12==0.7.1
[pip3] nvidia-cusparselt-cu13==0.8.0
[pip3] nvidia-cutlass-dsl==4.4.2
[pip3] nvidia-cutlass-dsl-libs-base==4.4.2
[pip3] nvidia-ml-py==13.590.48
[pip3] nvidia-nccl-cu12==2.27.5
[pip3] nvidia-nccl-cu13==2.29.3
[pip3] nvidia-nvjitlink==13.0.88
[pip3] nvidia-nvjitlink-cu12==12.8.93
[pip3] nvidia-nvshmem-cu12==3.4.5
[pip3] nvidia-nvshmem-cu13==3.4.5
[pip3] nvidia-nvtx==13.0.85
[pip3] nvidia-nvtx-cu12==12.8.90
[pip3] pyzmq==27.1.0
[pip3] torch==2.10.0
[pip3] torch-c-dlpack-ext==0.1.5
[pip3] torchaudio==2.10.0
[pip3] torchvision==0.25.0
[pip3] transformers==4.57.6
[pip3] triton==3.6.0+git9844da95
[conda] Could not collect

==============================
         vLLM Info
==============================
ROCM Version                 : Could not collect
vLLM Version                 : 0.17.2rc1.dev11+g293f036e6.d20260317 (git sha: 293f036e6, date: 20260317)
vLLM Build Flags:
  CUDA Archs: Not Set; ROCm: Disabled
GPU Topology:
  	GPU0	CPU Affinity	NUMA Affinity	GPU NUMA ID
GPU0	 X 	0-31	0		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
==============================
PYTORCH_NVML_BASED_CUDA_CHECK=1
TORCHINDUCTOR_COMPILE_THREADS=1
TORCHINDUCTOR_CACHE_DIR=/tmp/torchinductor_awm

</details>

🐛 Describe the bug

Error msg:

(EngineCore pid=207) DEBUG 03-17 22:55:01 [model_executor/models/qwen3_next.py:776] GDN prefill kernel warmup (T=64) completed for layer language_model.model.layers.38.linear_attn
(EngineCore pid=207) INFO 03-17 22:55:01 [compilation/monitor.py:76] Initial profiling/warmup run took 158.40 s
(APIServer pid=1) DEBUG 03-17 22:55:05 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(APIServer pid=1) DEBUG 03-17 22:55:15 [v1/engine/utils.py:1021] Waiting for 1 local, 0 remote core engine proc(s) to start.
(EngineCore pid=207) INFO 03-17 22:55:16 [v1/core/kv_cache_utils.py:826] Overriding num_gpu_blocks=0 with num_gpu_blocks_override=512
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] EngineCore failed to start.
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] Traceback (most recent call last):
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     super().__init__(
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     return func(*args, **kwargs)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]     block_sizes=[placeholder_block_size],
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099]                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) ERROR 03-17 22:55:16 [v1/engine/core.py:1099] NameError: name 'placeholder_block_size' is not defined
(EngineCore pid=207) Process EngineCore:
(EngineCore pid=207) Traceback (most recent call last):
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap
(EngineCore pid=207)     self.run()
(EngineCore pid=207)   File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run
(EngineCore pid=207)     self._target(*self._args, **self._kwargs)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1103, in run_engine_core
(EngineCore pid=207)     raise e
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1073, in run_engine_core
(EngineCore pid=207)     engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore pid=207)                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 839, in __init__
(EngineCore pid=207)     super().__init__(
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore pid=207)     kv_cache_config = self._initialize_kv_caches(vllm_config)
(EngineCore pid=207)                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 245, in _initialize_kv_caches
(EngineCore pid=207)     available_gpu_memory = self.model_executor.determine_available_memory()
(EngineCore pid=207)                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 136, in determine_available_memory
(EngineCore pid=207)     return self.collective_rpc("determine_available_memory")
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/uniproc_executor.py", line 78, in collective_rpc
(EngineCore pid=207)     result = run_method(self.driver_worker, method, args, kwargs)
(EngineCore pid=207)              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 397, in determine_available_memory
(EngineCore pid=207)     cudagraph_memory_estimate = self.model_runner.profile_cudagraph_memory()
(EngineCore pid=207)                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/torch/utils/_contextlib.py", line 124, in decorate_context
(EngineCore pid=207)     return func(*args, **kwargs)
(EngineCore pid=207)            ^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5595, in profile_cudagraph_memory
(EngineCore pid=207)     self._init_minimal_kv_cache_for_profiling()
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5549, in _init_minimal_kv_cache_for_profiling
(EngineCore pid=207)     self.initialize_kv_cache(minimal_config)
(EngineCore pid=207)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6487, in initialize_kv_cache
(EngineCore pid=207)     block_sizes=[placeholder_block_size],
(EngineCore pid=207)                  ^^^^^^^^^^^^^^^^^^^^^^
(EngineCore pid=207) NameError: name 'placeholder_block_size' is not defined
[rank0]:[W317 22:55:17.937545770 ProcessGroupNCCL.cpp:1553] Warning: WARNING: destroy_process_group() was not called before program exit, which can leak resources. For more info, please see https://pytorch.org/docs/stable/distributed.html#shutdown (function operator())
(APIServer pid=1) Traceback (most recent call last):
(APIServer pid=1)   File "/usr/local/bin/vllm", line 10, in <module>
(APIServer pid=1)     sys.exit(main())
(APIServer pid=1)              ^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/main.py", line 75, in main
(APIServer pid=1)     args.dispatch_function(args)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/cli/serve.py", line 118, in cmd
(APIServer pid=1)     uvloop.run(run_server(args))
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 96, in run
(APIServer pid=1)     return __asyncio.run(
(APIServer pid=1)            ^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 195, in run
(APIServer pid=1)     return runner.run(main)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
(APIServer pid=1)     return self._loop.run_until_complete(task)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "uvloop/loop.pyx", line 1518, in uvloop.loop.Loop.run_until_complete
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/uvloop/__init__.py", line 48, in wrapper
(APIServer pid=1)     return await main
(APIServer pid=1)            ^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 675, in run_server
(APIServer pid=1)     await run_server_worker(listen_address, sock, args, **uvicorn_kwargs)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 689, in run_server_worker
(APIServer pid=1)     async with build_async_engine_client(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 104, in build_async_engine_client
(APIServer pid=1)     async with build_async_engine_client_from_engine_args(
(APIServer pid=1)                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 210, in __aenter__
(APIServer pid=1)     return await anext(self.gen)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/entrypoints/openai/api_server.py", line 145, in build_async_engine_client_from_engine_args
(APIServer pid=1)     async_llm = AsyncLLM.from_vllm_config(
(APIServer pid=1)                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 225, in from_vllm_config
(APIServer pid=1)     return cls(
(APIServer pid=1)            ^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/async_llm.py", line 154, in __init__
(APIServer pid=1)     self.engine_core = EngineCoreClient.make_async_mp_client(
(APIServer pid=1)                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 128, in make_async_mp_client
(APIServer pid=1)     return AsyncMPClient(*client_args)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(APIServer pid=1)     return func(*args, **kwargs)
(APIServer pid=1)            ^^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 924, in __init__
(APIServer pid=1)     super().__init__(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core_client.py", line 583, in __init__
(APIServer pid=1)     with launch_core_engines(
(APIServer pid=1)          ^^^^^^^^^^^^^^^^^^^^
(APIServer pid=1)   File "/usr/lib/python3.12/contextlib.py", line 144, in __exit__
(APIServer pid=1)     next(self.gen)
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 972, in launch_core_engines
(APIServer pid=1)     wait_for_engine_startup(
(APIServer pid=1)   File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/utils.py", line 1031, in wait_for_engine_startup
(APIServer pid=1)     raise RuntimeError(
(APIServer pid=1) RuntimeError: Engine core initialization failed. See root cause above. Failed core proc(s): {}

Steps to reproduce:

git clone https://github.com/vllm-project/vllm/
cd vllm

podman build --build-arg CUDA_VERSION=13.0.1 --build-arg BUILD_BASE_IMAGE=nvidia/cuda:13.0.1-devel-ubuntu22.04 --build-arg max_jobs=8 --build-arg nvcc_threads=2 --build-arg RUN_WHEEL_CHECK=false --build-arg torch_cuda_arch_list='9.0 10.0+PTX' --tag vllm/vllm-openai --target vllm-openai -f docker/Dockerfile .

podman run -e "VLLM_LOGGING_LEVEL=DEBUG" -e "VLLM_TRACE_FUNCTION=1" --device nvidia.com/gpu=all -v ~/.cache/huggingface:/root/.cache/huggingface -p 8080:8000 --ipc=host vllm/vllm-openai --model Qwen/Qwen3.5-35B-A3B-GPTQ-Int4 --dtype auto --api-key token-coiano --cpu-offload-gb 56 --gpu-memory-utilization 0.97 --tensor-parallel-size 1

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Fix Plan

The error message indicates a NameError due to the undefined variable placeholder_block_size. To fix this issue, we need to define this variable before using it.

Here are the steps to fix the issue:

Identify the file where the error occurs: gpu_model_runner.py
Locate the line where the error happens: block_sizes=[placeholder_block_size],
Define the placeholder_block_size variable before using it. The value of this variable depends on the specific requirements of your application.

Example code:

# Define the placeholder_block_size variable
placeholder_block_size = 102

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vllm - ✅(Solved) Fix [Bug]: 'placeholder_block_size' is not defined [1 pull requests, 1 participants]

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PR #37622: [Bugfix] Fix Step3 pipeline parallel KeyError for residual tensor

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PR #37622: [Bugfix] Fix Step3 pipeline parallel KeyError for residual tensor

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