Kernel error: jupyter_client/connect.py AssertionError

Question

错误信息

Traceback (most recent call last):
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/web.py", line 1699, in _execute
        result = await result
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "/home/djan/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/handlers.py", line 72, in post
        type=mtype))
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "/home/djan/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py", line 88, in create_session
        kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
        yielded = self.gen.throw(*exc_info)  # type: ignore
      File "/home/djan/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py", line 101, in start_kernel_for_session
        self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
        value = future.result()
      File "/home/djan/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 209, in wrapper
        yielded = next(result)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/notebook/services/kernels/kernelmanager.py", line 168, in start_kernel
        super(MappingKernelManager, self).start_kernel(**kwargs)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
        km.start_kernel(**kwargs)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/jupyter_client/manager.py", line 240, in start_kernel
        self.write_connection_file()
      File "/home/djan/anaconda3/lib/python3.7/site-packages/jupyter_client/connect.py", line 547, in write_connection_file
        kernel_name=self.kernel_name
      File "/home/djan/anaconda3/lib/python3.7/site-packages/jupyter_client/connect.py", line 212, in write_connection_file
        with secure_write(fname) as f:
      File "/home/djan/anaconda3/lib/python3.7/contextlib.py", line 112, in __enter__
        return next(self.gen)
      File "/home/djan/anaconda3/lib/python3.7/site-packages/jupyter_client/connect.py", line 105, in secure_write
        assert '0600' == oct(stat.S_IMODE(os.stat(fname).st_mode)).replace('0o', '0')
    AssertionError

系统信息

运行在 Linux 服务器上安装 Jupyter (v. 1.0.0)，使用 anaconda3 (v. 2019.07) 64 位。

可用内核

可用内核：
python3 /home/djan/.local/share/jupyter/kernels/python3
nn /home/djan/.local/share/jupyter/kernels/nn

重现问题

安装最新的 anaconda3 版本。
运行基本版本的 Jupyter notebook --> 内核运行良好
使用 python 创建新环境：conda create -n test python=3.7
激活环境后，Jupyter notebook 不可用，必须通过Conda安装：conda install -c anaconda jupyter
运行测试环境中的 Jupyter notebook --> 内核如上文所述发生故障

到目前为止我尝试了什么

在 Conda 环境中的服务器上运行 Jupyter 时，文件权限似乎存在问题。我试图为我的 anaconda3 文件夹中的所有文件提供请求的权限 (0600)，但这没有帮助。

Answer 1

更新

事实证明，最新版本的 jupyter_client（在 anaconda 下可用，版本为 5.3.3）破坏了服务器上的 Jupyter 环境。

通过以下命令安装以前版本的 jupyter_client 修复了此问题：

conda install -c anaconda jupyter_client=5.3.1

Answer 2

不错更新

事实证明，最新版本的 jupyter_client（在 anaconda 下可用，版本为 5.3.3）破坏了服务器上的 Jupyter 环境。

通过以下命令安装以前版本的 jupyter_client 修复了此问题：

conda install -c anaconda jupyter_client=5.3.1

Kernel error: jupyter_client/connect.py AssertionError