[Bug] disk cache io error when simultaneously loading lots of sglang offline engine

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Describe the bug

when I use slurm to launch 32 or 192 jobs for offline batch inference, which simultaneously load sgl.engine. I met the following error although I set disable_disk_cache=True. If I only run one job for this, it will not meet this error.

The error is as follows:

Traceback (most recent call last):
  File "/home/xiaonan/mycode/code_data_synthesis/generate_python_docstring_slurm_task.py", line 64, in <module>
    llm = sgl.Engine(model_path=args.model_name, tp_size=args.tp_size, disable_disk_cache=True)
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/api.py", line 48, in Engine
    from sglang.srt.server import Engine
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/srt/server.py", line 49, in <module>
    from sglang.srt.managers.data_parallel_controller import (
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/srt/managers/data_parallel_controller.py", line 24, in <module>
    from sglang.srt.managers.io_struct import (
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/srt/managers/io_struct.py", line 26, in <module>
    from sglang.srt.managers.schedule_batch import BaseFinishReason
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/srt/managers/schedule_batch.py", line 40, in <module>
    from sglang.srt.constrained.grammar import Grammar
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/sglang/srt/constrained/__init__.py", line 24, in <module>
    from outlines.caching import cache as disk_cache
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/__init__.py", line 2, in <module>
    import outlines.generate
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/generate/__init__.py", line 2, in <module>
    from .cfg import cfg
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/generate/cfg.py", line 3, in <module>
    from outlines.fsm.guide import CFGGuide
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/fsm/guide.py", line 109, in <module>
    def create_states_mapping(
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/caching.py", line 93, in decorator
    memory = get_cache()
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/outlines/caching.py", line 55, in get_cache
    memory = Cache(
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/diskcache/core.py", line 499, in __init__
    sql(query, (key, value))
  File "/home/xiaonan/miniconda3/envs/llm_training_39/lib/python3.9/site-packages/diskcache/core.py", line 666, in _execute_with_retry
    return sql(statement, *args, **kwargs)
sqlite3.OperationalError: disk I/O error

Reproduction

Python: slurm_task.py

import sglang as sgl
llm = sgl.Engine(model_path='Qwen/Qwen2.5-Coder-32B-Instruct', tp_size=2, disable_disk_cache=True)

Sbatch Script:

#!/bin/bash
#SBATCH --job-name=task1  # job name
#SBATCH --output=slurm_logs/%A_%a/output.txt     # output file 
#SBATCH --error=slurm_logs/%A_%a/error.txt       # error file
#SBATCH --array=0-191%192
#SBATCH --ntasks=1
#SBATCH --gres=gpu:2
#SBATCH --cpus-per-task=16            

Python slurm_task.py

Environment

2024-11-19 08:47:37.576574: I tensorflow/stream_executor/platform/default/dso_loader.cc:53] Successfully opened dynamic library libcudart.so.11.0 Python: 3.9.19 (main, May 6 2024, 19:43:03) [GCC 11.2.0] CUDA available: False PyTorch: 2.4.0 sglang: 0.3.5 flashinfer: 0.1.6+cu124torch2.4 triton: 3.0.0 transformers: 4.46.2 requests: 2.32.3 tqdm: 4.67.0 numpy: 1.23.0 aiohttp: 3.10.5 fastapi: 0.115.4 hf_transfer: 0.1.8 huggingface_hub: 0.24.6 interegular: 0.3.3 packaging: 24.1 PIL: 10.4.0 psutil: 6.0.0 pydantic: 2.9.2 uvicorn: 0.32.0 uvloop: 0.21.0 zmq: 26.2.0 vllm: 0.6.3.post1 multipart: 0.0.17 openai: 1.54.4 anthropic: 0.39.0 Hypervisor vendor: KVM ulimit soft: 1024