[Bug]: AssertError when testing VLLM performance with preempt mode set to "swap" and VLLM_TEST_ENABLE_ARTIFICIAL_PREEMPT=1

[Minamoto25]

Your current environment

The output of `python collect_env.py`

Collecting environment information...
PyTorch version: 2.5.1+cu124
Is debug build: False
CUDA used to build PyTorch: 12.4
ROCM used to build PyTorch: N/A

OS: Ubuntu 22.04.5 LTS (x86_64)
GCC version: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Clang version: 20.0.0 (++20240930053731+af47038fb138-1~exp1~20240930053910.1959)
CMake version: version 3.31.0
Libc version: glibc-2.35

Python version: 3.10.15 (main, Oct  3 2024, 07:27:34) [GCC 11.2.0] (64-bit runtime)
Python platform: Linux-5.15.0-118-generic-x86_64-with-glibc2.35
Is CUDA available: True
CUDA runtime version: 12.4.131
CUDA_MODULE_LOADING set to: LAZY
GPU models and configuration: 
GPU 0: NVIDIA GeForce RTX 4090
GPU 1: NVIDIA GeForce RTX 4090

Nvidia driver version: 550.90.07
cuDNN version: Probably one of the following:
/usr/lib/x86_64-linux-gnu/libcudnn.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_adv.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_cnn.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_engines_precompiled.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_engines_runtime_compiled.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_graph.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_heuristic.so.9.1.1
/usr/lib/x86_64-linux-gnu/libcudnn_ops.so.9.1.1
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: True

CPU:
Architecture:                         x86_64
CPU op-mode(s):                       32-bit, 64-bit
Address sizes:                        46 bits physical, 57 bits virtual
Byte Order:                           Little Endian
CPU(s):                               160
On-line CPU(s) list:                  0-159
Vendor ID:                            GenuineIntel
Model name:                           Intel(R) Xeon(R) Platinum 8460Y+
CPU family:                           6
Model:                                143
Thread(s) per core:                   2
Core(s) per socket:                   40
Socket(s):                            2
Stepping:                             6
CPU max MHz:                          3700.0000
CPU min MHz:                          800.0000
BogoMIPS:                             4000.00
Flags:                                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cat_l2 cdp_l3 invpcid_single intel_ppin cdp_l2 ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local split_lock_detect avx_vnni avx512_bf16 wbnoinvd dtherm ida arat pln pts hwp hwp_act_window hwp_epp hwp_pkg_req avx512vbmi umip pku ospke waitpkg avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq la57 rdpid bus_lock_detect cldemote movdiri movdir64b enqcmd fsrm md_clear serialize tsxldtrk pconfig arch_lbr amx_bf16 avx512_fp16 amx_tile amx_int8 flush_l1d arch_capabilities
Virtualization:                       VT-x
L1d cache:                            3.8 MiB (80 instances)
L1i cache:                            2.5 MiB (80 instances)
L2 cache:                             160 MiB (80 instances)
L3 cache:                             210 MiB (2 instances)
NUMA node(s):                         2
NUMA node0 CPU(s):                    0-39,80-119
NUMA node1 CPU(s):                    40-79,120-159
Vulnerability Gather data sampling:   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 Reg file data sampling: Not affected
Vulnerability Retbleed:               Not affected
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; Enhanced / Automatic IBRS; IBPB conditional; RSB filling; PBRSB-eIBRS SW sequence; BHI BHI_DIS_S
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected

Versions of relevant libraries:
[pip3] numpy==1.26.4
[pip3] nvidia-cublas-cu12==12.4.5.8
[pip3] nvidia-cuda-cupti-cu12==12.4.127
[pip3] nvidia-cuda-nvrtc-cu12==12.4.127
[pip3] nvidia-cuda-runtime-cu12==12.4.127
[pip3] nvidia-cudnn-cu12==9.1.0.70
[pip3] nvidia-cufft-cu12==11.2.1.3
[pip3] nvidia-curand-cu12==10.3.5.147
[pip3] nvidia-cusolver-cu12==11.6.1.9
[pip3] nvidia-cusparse-cu12==12.3.1.170
[pip3] nvidia-ml-py==12.560.30
[pip3] nvidia-nccl-cu12==2.21.5
[pip3] nvidia-nvjitlink-cu12==12.4.127
[pip3] nvidia-nvtx-cu12==12.4.127
[pip3] pyzmq==26.2.0
[pip3] torch==2.5.1
[pip3] torchvision==0.20.1
[pip3] transformers==4.46.3
[pip3] triton==3.1.0
[conda] numpy                     1.26.4                   pypi_0    pypi
[conda] nvidia-cublas-cu12        12.4.5.8                 pypi_0    pypi
[conda] nvidia-cuda-cupti-cu12    12.4.127                 pypi_0    pypi
[conda] nvidia-cuda-nvrtc-cu12    12.4.127                 pypi_0    pypi
[conda] nvidia-cuda-runtime-cu12  12.4.127                 pypi_0    pypi
[conda] nvidia-cudnn-cu12         9.1.0.70                 pypi_0    pypi
[conda] nvidia-cufft-cu12         11.2.1.3                 pypi_0    pypi
[conda] nvidia-curand-cu12        10.3.5.147               pypi_0    pypi
[conda] nvidia-cusolver-cu12      11.6.1.9                 pypi_0    pypi
[conda] nvidia-cusparse-cu12      12.3.1.170               pypi_0    pypi
[conda] nvidia-ml-py              12.560.30                pypi_0    pypi
[conda] nvidia-nccl-cu12          2.21.5                   pypi_0    pypi
[conda] nvidia-nvjitlink-cu12     12.4.127                 pypi_0    pypi
[conda] nvidia-nvtx-cu12          12.4.127                 pypi_0    pypi
[conda] pyzmq                     26.2.0                   pypi_0    pypi
[conda] torch                     2.5.1                    pypi_0    pypi
[conda] torchvision               0.20.1                   pypi_0    pypi
[conda] transformers              4.46.3                   pypi_0    pypi
[conda] triton                    3.1.0                    pypi_0    pypi
ROCM Version: Could not collect
Neuron SDK Version: N/A
vLLM Version: 0.6.4.post2.dev6+g755b8535
vLLM Build Flags:
CUDA Archs: Not Set; ROCm: Disabled; Neuron: Disabled
GPU Topology:
GPU0    GPU1    CPU Affinity    NUMA Affinity   GPU NUMA ID
GPU0     X      NODE    40-79,120-159   1               N/A
GPU1    NODE     X      40-79,120-159   1               N/A

Legend:

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

LD_LIBRARY_PATH=/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/cv2/../../lib64:/usr/local/cuda/lib64/:/usr/local/cuda/lib64/:
CUDA_MODULE_LOADING=LAZY

Model Input Dumps

No response

🐛 Describe the bug

When setting the environment variable VLLM_TEST_ENABLE_ARTIFICIAL_PREEMPT on the server and enabling the swap preemption mode, running the benchmarks/benchmark_serving.py script to test the performance of VLLM triggers an AssertionError.

Steps to Reproduce:
Client-side:

python benchmark_serving.py --model Qwen2.5-7B-Instruct --request-rate 2 --dataset-path ShareGPT_V3_unfiltered_cleaned_split.json --disable-tqdm

Server-side:

export VLLM_TEST_ENABLE_ARTIFICIAL_PREEMPT=1
vllm serve Qwen2.5-7B-Instruct \
    --block-size 32 \
    --dtype float16 \
    --preemption-mode swap \
    --disable-log-requests \
    --max-model-len 1024 \
    --max_num_batched_tokens 10000 \
    --gpu-memory-utilization 0.9

Server-side error:

WARNING 11-27 02:04:48 scheduler.py:1481] Sequence group cmpl-f5a99b8801444ad19f63a764ebb493b7-0 is preempted by PreemptionMode.SWAP mode because there is not enough KV cache space. This can affect the end-to-end performance. Increase gpu_memory_utilization or tensor_parallel_size to provide more KV cache memory. total_num_cumulative_preemption=1
ERROR 11-27 02:04:48 engine.py:135] AssertionError()
ERROR 11-27 02:04:48 engine.py:135] Traceback (most recent call last):
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/multiprocessing/engine.py", line 133, in start
ERROR 11-27 02:04:48 engine.py:135]     self.run_engine_loop()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/multiprocessing/engine.py", line 196, in run_engine_loop
ERROR 11-27 02:04:48 engine.py:135]     request_outputs = self.engine_step()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/multiprocessing/engine.py", line 214, in engine_step
ERROR 11-27 02:04:48 engine.py:135]     raise e
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/multiprocessing/engine.py", line 205, in engine_step
ERROR 11-27 02:04:48 engine.py:135]     return self.engine.step()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/llm_engine.py", line 1405, in step
ERROR 11-27 02:04:48 engine.py:135]     ) = self.scheduler[virtual_engine].schedule()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/core/scheduler.py", line 1219, in schedule
ERROR 11-27 02:04:48 engine.py:135]     scheduler_outputs: SchedulerOutputs = self._schedule()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/core/scheduler.py", line 1178, in _schedule
ERROR 11-27 02:04:48 engine.py:135]     return self._schedule_default()
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/core/scheduler.py", line 1024, in _schedule_default
ERROR 11-27 02:04:48 engine.py:135]     running_scheduled = self._schedule_running(budget,
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/core/scheduler.py", line 593, in _schedule_running
ERROR 11-27 02:04:48 engine.py:135]     self.output_proc_callback(
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/utils.py", line 1125, in weak_bound
ERROR 11-27 02:04:48 engine.py:135]     unbound(inst, *args, **kwargs)
ERROR 11-27 02:04:48 engine.py:135]   File "/disk1/minamoto/vllm/vllm/engine/llm_engine.py", line 1093, in _process_model_outputs
ERROR 11-27 02:04:48 engine.py:135]     assert len(seq_group_metadata_list) == len(
ERROR 11-27 02:04:48 engine.py:135] AssertionError
DEBUG 11-27 02:04:48 engine.py:139] MQLLMEngine is shut down.
ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 259, in __call__
    await wrap(partial(self.listen_for_disconnect, receive))
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 255, in wrap
    await func()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 232, in listen_for_disconnect
    message = await receive()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 118, in receive_or_disconnect
    async with anyio.create_task_group() as task_group:
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 126, in receive_or_disconnect
    message = await wrap(wrapped_receive)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 121, in wrap
    result = await func()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 51, in wrapped_receive
    msg = await self.receive()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py", line 563, in receive
    await self.message_event.wait()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/asyncio/locks.py", line 214, in wait
    await fut
asyncio.exceptions.CancelledError: Cancelled by cancel scope 7f1a263262f0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 188, in __call__
    await response(scope, wrapped_receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 222, in __call__
    async for chunk in self.body_iterator:
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 179, in body_stream
    raise app_exc
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 149, in coro
    await self.app(scope, receive_or_disconnect, send_no_error)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/cors.py", line 85, in __call__
    await self.app(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 62, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/routing.py", line 715, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/routing.py", line 735, in app
    await route.handle(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/routing.py", line 288, in handle
    await self.app(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/routing.py", line 76, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/routing.py", line 74, in app
    await response(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 252, in __call__
    async with anyio.create_task_group() as task_group:
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 763, in __aexit__
    raise BaseExceptionGroup(
exceptiongroup.ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_utils.py", line 76, in collapse_excgroups
    yield
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 186, in __call__
    async with anyio.create_task_group() as task_group:
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 763, in __aexit__
    raise BaseExceptionGroup(
exceptiongroup.ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py", line 409, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    return await self.app(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/errors.py", line 187, in __call__
    raise exc
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/errors.py", line 165, in __call__
    await self.app(scope, receive, _send)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/middleware/base.py", line 185, in __call__
    with collapse_excgroups():
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/contextlib.py", line 153, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/_utils.py", line 82, in collapse_excgroups
    raise exc
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 255, in wrap
    await func()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/starlette/responses.py", line 244, in stream_response
    async for chunk in self.body_iterator:
  File "/disk1/minamoto/vllm/vllm/entrypoints/openai/serving_completion.py", line 258, in completion_stream_generator
    async for prompt_idx, res in result_generator:
  File "/disk1/minamoto/vllm/vllm/utils.py", line 444, in merge_async_iterators
    item = await d
  File "/disk1/minamoto/vllm/vllm/engine/multiprocessing/client.py", line 633, in _process_request
    raise request_output
vllm.engine.multiprocessing.MQEngineDeadError: Engine loop is not running. Inspect the stacktrace to find the original error: AssertionError().
[rank0]:[W1127 02:04:49.768143444 ProcessGroupNCCL.cpp:1250] Warning: WARNING: process group has NOT been destroyed before we destruct ProcessGroupNCCL. On normal program exit, the application should call destroy_process_group to ensure that any pending NCCL operations have finished in this process. In rare cases this process can exit before this point and block the progress of another member of the process group. This constraint has always been present,  but this warning has only been added since PyTorch 2.4 (function operator())
DEBUG 11-27 02:04:56 client.py:165] Heartbeat successful.
ERROR 11-27 02:04:56 client.py:282] RuntimeError('Engine process (pid 144218) died.')
ERROR 11-27 02:04:56 client.py:282] NoneType: None
DEBUG 11-27 02:04:58 client.py:186] Waiting for output from MQLLMEngine.
DEBUG 11-27 02:04:58 client.py:186] Waiting for output from MQLLMEngine.

Client-side error:

Starting initial single prompt test run...
Traceback (most recent call last):
  File "/disk1/minamoto/vllm/lab2/benchmark_serving.py", line 966, in <module>
    main(args)
  File "/disk1/minamoto/vllm/lab2/benchmark_serving.py", line 671, in main
    benchmark_result = asyncio.run(
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/disk1/minamoto/vllm/lab2/benchmark_serving.py", line 427, in benchmark
    raise ValueError(
ValueError: Initial test run failed - Please make sure benchmark arguments are correctly specified. Error: Traceback (most recent call last):
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/aiohttp/client_proto.py", line 92, in connection_lost
    uncompleted = self._parser.feed_eof()
  File "aiohttp/_http_parser.pyx", line 513, in aiohttp._http_parser.HttpParser.feed_eof
aiohttp.http_exceptions.TransferEncodingError: 400, message:
  Not enough data for satisfy transfer length header.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/disk1/minamoto/vllm/lab2/backend_request_func.py", line 259, in async_request_openai_completions
    async for chunk_bytes in response.content:
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/aiohttp/streams.py", line 52, in __anext__
    rv = await self.read_func()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/aiohttp/streams.py", line 349, in readline
    return await self.readuntil()
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/aiohttp/streams.py", line 383, in readuntil
    await self._wait("readuntil")
  File "/home/minamoto/miniconda3/envs/vllm_main/lib/python3.10/site-packages/aiohttp/streams.py", line 344, in _wait
    await waiter
aiohttp.client_exceptions.ClientPayloadError: Response payload is not completed: <TransferEncodingError: 400, message='Not enough data for satisfy transfer length header.'>

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