qwen3.5 rl 训练报错

Checklist / 检查清单

• I have searched existing issues, and this is a new bug report. / 我已经搜索过现有的 issues，确认这是一个新的 bug report。

Bug Description / Bug 描述

Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/filelock/_unix.py", line 49, in _acquire
fd = os.open(self.lock_file, open_flags, open_mode)
PermissionError: [Errno 1] Operation not permitted: '/njfs/train-security/xx/safe_datasets_rl/ms-swift-main/cache/datasets/cache_datasets_json_default-1abd18085476e206_0.0.0_f4e89e8750d5d5ffbef2c078bf0ddfedef29dc2faff52a6255cf513c05eb1092.lock'
但是 我目录下没产生这个文件；
During handling of the above exception, another exception occurred:

fd = os.open(self.lock_file, open_flags & ~os.O_CREAT, open_mode) PermissionError: [Errno 1] Operation not permitted: '/njfs/train-security/xx/safe_datasets_rl/ms-swift-main/cache/datasets/cache_datasets_json_default-1abd18085476e206_0.0.0_f4e89e8750d5d5ffbef2c078bf0ddfedef29dc2faff52a6255cf513c05eb1092.lock'

How to Reproduce / 如何复现

ubuntu22.04-cuda12.8.1-py311-torch2.10.0-vllm0.17.0-modelscope1.34.0-swift4.0.1 使用官方提供的镜像

Additional Information / 补充信息

No response

Start by reproducing the Qwen3.5 RL training failure in the listed Ubuntu 22.04 CUDA 12.8.1 Python 3.11 image. Inspect the filelock traceback and the referenced cache path, including why the .lock file cannot be created or opened. Done means the permission-related cause is identified and a verified resolution or clearer reproduction is documented.