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flash_attn 2.5.9.post1 fails with ImportError on Python 3.10 #1027

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Laz4rz opened this issue Jul 4, 2024 · 0 comments
Open

flash_attn 2.5.9.post1 fails with ImportError on Python 3.10 #1027

Laz4rz opened this issue Jul 4, 2024 · 0 comments

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@Laz4rz
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Laz4rz commented Jul 4, 2024

Trying to import flash_attn with:

python: 3.10.14 (main, May  6 2024, 19:42:50) [GCC 11.2.0]
transformers: 4.42.3
torch: 2.3.1+cu121
flash_attn 2.5.9.post1

Fails with ImportError:

ImportError: /home/mikolaj/miniconda3/envs/gemma/lib/python3.10/site-packages/flash_attn_2_cuda.cpython-310-x86_64-linux-gnu.so: undefined symbol: _ZN2at4_ops5zeros4callEN3c108ArrayRefINS2_6SymIntEEENS2_8optionalINS2_10ScalarTypeEEENS6_INS2_6LayoutEEENS6_INS2_6DeviceEEENS6_IbEE

Current fix is to change the Python to 3.11 or 3.12.
YumaTsuta added a commit to llm-jp/modelwg that referenced this issue Jul 9, 2024
@YumaTsuta
fix: Resolve pip install errors by adjusting dependencies and cleanup
b9ea286 
- Added 'setuptools<70' to requirements to ensure compatibility with packaging library (see: aws-neuron/aws-neuron-sdk#893)
- Added version restriction "flash-attn!=2.5.9.post1" to resolve installation issues with Python 3.10 (see: Dao-AILab/flash-attention#1027)
- Removed obsolete file copy commands for non-existent files
@YumaTsuta YumaTsuta mentioned this issue Jul 9, 2024
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@Laz4rz Laz4rz mentioned this issue Jul 11, 2024
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@Laz4rz