[Bug]: V1 with MLA enable throw error cannot import name 'get_flash_attn_version' from 'vllm.attention.backends.utils' #15265
Description
Your current environment
The output of `python collect_env.py`
INFO 03-21 03:04:54 [__init__.py:256] Automatically detected platform cuda.
Collecting environment information...
PyTorch version: 2.6.0+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: Could not collect
CMake version: version 3.31.6
Libc version: glibc-2.35
Python version: 3.12.9 (main, Mar 11 2025, 17:26:57) [Clang 20.1.0 ] (64-bit runtime)
Python platform: Linux-5.4.241-1-tlinux4-0017.7-x86_64-with-glibc2.35
Is CUDA available: True
CUDA runtime version: 12.8.61
CUDA_MODULE_LOADING set to: LAZY
GPU models and configuration:
GPU 0: NVIDIA H20
GPU 1: NVIDIA H20
GPU 2: NVIDIA H20
GPU 3: NVIDIA H20
GPU 4: NVIDIA H20
GPU 5: NVIDIA H20
GPU 6: NVIDIA H20
GPU 7: NVIDIA H20
Nvidia driver version: 535.161.08
cuDNN version: Could not collect
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: 52 bits physical, 57 bits virtual
Byte Order: Little Endian
CPU(s): 384
On-line CPU(s) list: 0-383
Vendor ID: AuthenticAMD
BIOS Vendor ID: Advanced Micro Devices, Inc.
Model name: AMD EPYC 9K84 96-Core Processor
BIOS Model name: AMD EPYC 9K84 96-Core Processor
CPU family: 25
Model: 17
Thread(s) per core: 2
Core(s) per socket: 96
Socket(s): 2
Stepping: 1
Frequency boost: enabled
CPU max MHz: 2600.0000
CPU min MHz: 1500.0000
BogoMIPS: 5200.13
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 nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic 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 cpb cat_l3 cdp_l3 invpcid_single hw_pstate ssbd mba ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed 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 avx512_bf16 clzero irperf xsaveerptr wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq la57 rdpid overflow_recov succor smca fsrm flush_l1d
Virtualization: AMD-V
L1d cache: 6 MiB (192 instances)
L1i cache: 6 MiB (192 instances)
L2 cache: 192 MiB (192 instances)
L3 cache: 768 MiB (24 instances)
NUMA node(s): 2
NUMA node0 CPU(s): 0-95,192-287
NUMA node1 CPU(s): 96-191,288-383
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Mmio stale data: Not affected
Vulnerability Retbleed: 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; Retpolines, IBPB conditional, IBRS_FW, STIBP always-on, RSB filling, PBRSB-eIBRS Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
Versions of relevant libraries:
[pip3] flashinfer-python==0.2.1.post2+cu124torch2.6
[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-cusparselt-cu12==0.6.2
[pip3] nvidia-nccl-cu12==2.21.5
[pip3] nvidia-nvjitlink-cu12==12.4.127
[pip3] nvidia-nvtx-cu12==12.4.127
[pip3] pyzmq==26.3.0
[pip3] torch==2.6.0
[pip3] torchaudio==2.6.0
[pip3] torchvision==0.21.0
[pip3] transformers==4.49.0
[pip3] triton==3.2.0
[conda] Could not collect
ROCM Version: Could not collect
Neuron SDK Version: N/A
vLLM Version: 0.8.2.dev33+g0c6f5023
vLLM Build Flags:
CUDA Archs: Not Set; ROCm: Disabled; Neuron: Disabled
GPU Topology:
GPU0 GPU1 GPU2 GPU3 GPU4 GPU5 GPU6 GPU7 NIC0 NIC1 NIC2 NIC3 NIC4 NIC5 NIC6 NIC7 NIC8 NIC9 NIC10 NIC11 NIC12 NIC13 NIC14 NIC15 NIC16 NIC17 NIC18 NIC19 NIC20 NIC21 NIC22 NIC23 NIC24 NIC25 CPU Affinity NUMA Affinity GPU NUMA ID
GPU0 X NV18 NV18 NV18 NV18 NV18 NV18 NV18 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS PIX NODE NODE NODE SYS SYS SYS SYS 0-95,192-287 0 N/A
GPU1 NV18 X NV18 NV18 NV18 NV18 NV18 NV18 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE NODE PHB PIX SYS SYS SYS SYS 0-95,192-287 0 N/A
GPU2 NV18 NV18 X NV18 NV18 NV18 NV18 NV18 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE NODE PIX PHB SYS SYS SYS SYS 0-95,192-287 0 N/A
GPU3 NV18 NV18 NV18 X NV18 NV18 NV18 NV18 SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE PIX NODE NODE SYS SYS SYS SYS 0-95,192-287 0 N/A
GPU4 NV18 NV18 NV18 NV18 X NV18 NV18 NV18 NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS NODE NODE PIX NODE 96-191,288-383 1 N/A
GPU5 NV18 NV18 NV18 NV18 NV18 X NV18 NV18 NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS NODE PIX NODE NODE 96-191,288-383 1 N/A
GPU6 NV18 NV18 NV18 NV18 NV18 NV18 X NV18 NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS PHB NODE NODE PIX 96-191,288-383 1 N/A
GPU7 NV18 NV18 NV18 NV18 NV18 NV18 NV18 X NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS PIX NODE NODE PHB 96-191,288-383 1 N/A
NIC0 SYS SYS SYS SYS NODE NODE NODE NODE X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC1 SYS SYS SYS SYS NODE NODE NODE NODE PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC2 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC3 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC4 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC5 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC6 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC7 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC8 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC9 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC10 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC11 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC12 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC13 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC14 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC15 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC16 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X PIX SYS SYS SYS SYS NODE NODE NODE NODE
NIC17 SYS SYS SYS SYS NODE NODE NODE NODE PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX PIX X SYS SYS SYS SYS NODE NODE NODE NODE
NIC18 PIX NODE NODE NODE SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS X NODE NODE NODE SYS SYS SYS SYS
NIC19 NODE NODE NODE PIX SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE X NODE NODE SYS SYS SYS SYS
NIC20 NODE PHB PIX NODE SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE NODE X PHB SYS SYS SYS SYS
NIC21 NODE PIX PHB NODE SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS NODE NODE PHB X SYS SYS SYS SYS
NIC22 SYS SYS SYS SYS NODE NODE PHB PIX NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS X NODE NODE PHB
NIC23 SYS SYS SYS SYS NODE PIX NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS NODE X NODE NODE
NIC24 SYS SYS SYS SYS PIX NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS NODE NODE X NODE
NIC25 SYS SYS SYS SYS NODE NODE PIX PHB NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE NODE SYS SYS SYS SYS PHB NODE NODE X
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
NIC Legend:
NIC0: mlx5_0
NIC1: mlx5_1
NIC2: mlx5_2
NIC3: mlx5_3
NIC4: mlx5_4
NIC5: mlx5_5
NIC6: mlx5_6
NIC7: mlx5_7
NIC8: mlx5_8
NIC9: mlx5_9
NIC10: mlx5_10
NIC11: mlx5_11
NIC12: mlx5_12
NIC13: mlx5_13
NIC14: mlx5_14
NIC15: mlx5_15
NIC16: mlx5_16
NIC17: mlx5_17
NIC18: mlx5_bond_1
NIC19: mlx5_bond_2
NIC20: mlx5_bond_3
NIC21: mlx5_bond_4
NIC22: mlx5_bond_5
NIC23: mlx5_bond_6
NIC24: mlx5_bond_7
NIC25: mlx5_bond_8
NVIDIA_VISIBLE_DEVICES=all
NVIDIA_REQUIRE_CUDA=cuda>=12.8 brand=unknown,driver>=470,driver<471 brand=grid,driver>=470,driver<471 brand=tesla,driver>=470,driver<471 brand=nvidia,driver>=470,driver<471 brand=quadro,driver>=470,driver<471 brand=quadrortx,driver>=470,driver<471 brand=nvidiartx,driver>=470,driver<471 brand=vapps,driver>=470,driver<471 brand=vpc,driver>=470,driver<471 brand=vcs,driver>=470,driver<471 brand=vws,driver>=470,driver<471 brand=cloudgaming,driver>=470,driver<471 brand=unknown,driver>=535,driver<536 brand=grid,driver>=535,driver<536 brand=tesla,driver>=535,driver<536 brand=nvidia,driver>=535,driver<536 brand=quadro,driver>=535,driver<536 brand=quadrortx,driver>=535,driver<536 brand=nvidiartx,driver>=535,driver<536 brand=vapps,driver>=535,driver<536 brand=vpc,driver>=535,driver<536 brand=vcs,driver>=535,driver<536 brand=vws,driver>=535,driver<536 brand=cloudgaming,driver>=535,driver<536 brand=unknown,driver>=550,driver<551 brand=grid,driver>=550,driver<551 brand=tesla,driver>=550,driver<551 brand=nvidia,driver>=550,driver<551 brand=quadro,driver>=550,driver<551 brand=quadrortx,driver>=550,driver<551 brand=nvidiartx,driver>=550,driver<551 brand=vapps,driver>=550,driver<551 brand=vpc,driver>=550,driver<551 brand=vcs,driver>=550,driver<551 brand=vws,driver>=550,driver<551 brand=cloudgaming,driver>=550,driver<551 brand=unknown,driver>=560,driver<561 brand=grid,driver>=560,driver<561 brand=tesla,driver>=560,driver<561 brand=nvidia,driver>=560,driver<561 brand=quadro,driver>=560,driver<561 brand=quadrortx,driver>=560,driver<561 brand=nvidiartx,driver>=560,driver<561 brand=vapps,driver>=560,driver<561 brand=vpc,driver>=560,driver<561 brand=vcs,driver>=560,driver<561 brand=vws,driver>=560,driver<561 brand=cloudgaming,driver>=560,driver<561 brand=unknown,driver>=565,driver<566 brand=grid,driver>=565,driver<566 brand=tesla,driver>=565,driver<566 brand=nvidia,driver>=565,driver<566 brand=quadro,driver>=565,driver<566 brand=quadrortx,driver>=565,driver<566 brand=nvidiartx,driver>=565,driver<566 brand=vapps,driver>=565,driver<566 brand=vpc,driver>=565,driver<566 brand=vcs,driver>=565,driver<566 brand=vws,driver>=565,driver<566 brand=cloudgaming,driver>=565,driver<566
NCCL_VERSION=2.25.1-1
NVIDIA_DRIVER_CAPABILITIES=compute,utility
NVIDIA_PRODUCT_NAME=CUDA
VLLM_USAGE_SOURCE=production-docker-image
CUDA_VERSION=12.8.0
LD_LIBRARY_PATH=/opt/venv/lib/python3.12/site-packages/cv2/../../lib64:/usr/local/nvidia/lib:/usr/local/nvidia/lib64
NCCL_CUMEM_ENABLE=0
TORCHINDUCTOR_COMPILE_THREADS=1
CUDA_MODULE_LOADING=LAZY
🐛 Describe the bug
Launch command: VLLM_TORCH_PROFILER_DIR=/disc/data/home/lehuading VLLM_ATTENTION_BACKEND=FLASHMLA vllm serve /disc/data1/deepseek/DeepSeek-R1 --trust-remote-code --served-model-name deepseek_r1_vllm_inference --tensor-parallel-size 16 --enable-reasoning --reasoning-parser deepseek_r1 --max-model-len 64000 --max_seq_len_to_capture 64000 --no-enable-prefix-caching
Error message:
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/worker/worker_base.py", line 621, in execute_method
ERROR 03-21 02:45:33 [core.py:330] raise e
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/worker/worker_base.py", line 612, in execute_method
ERROR 03-21 02:45:33 [core.py:330] return run_method(self, method, args, kwargs)
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/utils.py", line 2221, in run_method
ERROR 03-21 02:45:33 [core.py:330] return func(*args, **kwargs)
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/worker/worker_base.py", line 604, in init_device
ERROR 03-21 02:45:33 [core.py:330] self.worker.init_device() # type: ignore
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/v1/worker/gpu_worker.py", line 120, in init_device
ERROR 03-21 02:45:33 [core.py:330] self.model_runner: GPUModelRunner = GPUModelRunner(
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/v1/worker/gpu_model_runner.py", line 110, in __init__
ERROR 03-21 02:45:33 [core.py:330] self.attn_backend = get_attn_backend(
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/attention/selector.py", line 95, in get_attn_backend
ERROR 03-21 02:45:33 [core.py:330] return _cached_get_attn_backend(
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/attention/selector.py", line 154, in _cached_get_attn_backend
ERROR 03-21 02:45:33 [core.py:330] return resolve_obj_by_qualname(attention_cls)
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/utils.py", line 1904, in resolve_obj_by_qualname
ERROR 03-21 02:45:33 [core.py:330] module = importlib.import_module(module_name)
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "/root/.local/share/uv/python/cpython-3.12.9-linux-x86_64-gnu/lib/python3.12/importlib/__init__.py", line 90, in import_module
ERROR 03-21 02:45:33 [core.py:330] return _bootstrap._gcd_import(name[level:], package, level)
ERROR 03-21 02:45:33 [core.py:330] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap_external>", line 999, in exec_module
ERROR 03-21 02:45:33 [core.py:330] File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/v1/attention/backends/mla/flashmla.py", line 14, in <module>
ERROR 03-21 02:45:33 [core.py:330] from vllm.v1.attention.backends.mla.common import (MLACommonBackend,
ERROR 03-21 02:45:33 [core.py:330] File "/opt/venv/lib/python3.12/site-packages/vllm/v1/attention/backends/mla/common.py", line 198, in <module>
ERROR 03-21 02:45:33 [core.py:330] from vllm.attention.backends.utils import get_flash_attn_version
ERROR 03-21 02:45:33 [core.py:330] ImportError: cannot import name 'get_flash_attn_version' from 'vllm.attention.backends.utils' (/opt/venv/lib/python3.12/site-packages/vllm/attention/backends/utils.py)
ERROR 03-21 02:45:33 [core.py:330]
It is speculated that the issue is introduced by this MR(#14570). Since the get_flash_attn_version function was moved, but only the V0 code was adapted, and the V1 code was omitted.
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