Jupyter Notebook: (OperationalError('磁盘 I/O 错误',))

Question

我在运行现有 Jupyter Notebook 文件时收到以下错误

The history saving thread hit an unexpected error (OperationalError('disk I/O error',)).History will not be written to the database.

尽管如此，笔记本中的其余代码此后仍可以正常执行。但是，当我尝试创建新的笔记本文件时，此错误不允许我创建它，并且出现以下错误：

Error while saving file: python_notebook_ollie/Untitled2.ipynb disk I/O error
Traceback (most recent call last):
  File "/work/ollie/muali/miniconda3/lib/python3.6/site-packages/notebook/services/contents/filemanager.py", line 421, in save
    self.check_and_sign(nb, path)
  File "/work/ollie/muali/miniconda3/lib/python3.6/site-packages/notebook/services/contents/manager.py", line 440, in check_and_sign
    self.notary.sign(nb)
  File "/work/ollie/muali/miniconda3/lib/python3.6/site-packages/nbformat/sign.py", line 449, in sign
    self.store.store_signature(signature, self.algorithm)
  File "/work/ollie/muali/miniconda3/lib/python3.6/site-packages/nbformat/sign.py", line 207, in store_signature
    if not self.check_signature(digest, algorithm):
  File "/work/ollie/muali/miniconda3/lib/python3.6/site-packages/nbformat/sign.py", line 241, in check_signature
    self.db.commit()
sqlite3.OperationalError: disk I/O error
[W 15:08:48.093 NotebookApp] Unexpected error while saving file: python_notebook_ollie/Untitled2.ipynb disk I/O error
[E 15:08:48.094 NotebookApp] {
  "Host": "localhost:15695",
  "User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0",
  "Accept": "application/json, text/javascript, */*; q=0.01",
  "Accept-Language": "en-US,en;q=0.5",
  "Accept-Encoding": "gzip, deflate",
  "Referer": "http://localhost:15695/notebooks/python_notebook_ollie/Traj_case_study.ipynb",
  "Content-Type": "application/json",
  "X-Xsrftoken": "2|96ae1fed|bde68f8333dd4b46b900b02246747fa4|1520496687",
  "X-Requested-With": "XMLHttpRequest",
  "Content-Length": "19",
  "Cookie": "_xsrf=2|96ae1fed|bde68f8333dd4b46b900b02246747fa4|1520496687; username-localhost-15695=\"2|1:0|10:1520518043|24:username-localhost-15695|44:NjE5MWZlMWIzMjdmNGE2N2FlZmQ3NmE3NzRlNmNiZmQ=|8062f4c541e5dcef0d8b4a2d7e75cc59f1d27197ac4633b9da64b7bb94aae7a4\"",
  "Connection": "keep-alive"
}  

我尝试遵循这个答案并删除了history.sqlite文件，但是我仍然收到磁盘I/O错误。

github 上的一些线程说基于 NFS 的挂载可能会产生一些问题，但在过去它工作正常，直到我升级了 matplotlib 包。我现在已经降级了该软件包，但仍然无法消除该错误。

编辑：打开 .ipynb 文件时终端上显示的第一个错误是

The signatures database cannot be opened; maybe it is corrupted or  

encrypted. You may need to rerun your notebooks to ensure that they are trusted to run Javascript. The old signatures database has been renamed to ~/.local/share/jupyter/nbsignatures.db.bak and a new one has been created.

Answer 1

我能够让它工作，所以我会发布我所做的。我认为问题的原因是 SQLite 锁定不能在 NFS 文件系统上可靠地工作，如此链接中所述。

那里也给出了答案，我将在这里更详细地写出步骤：

基本上，必须为 ipython 创建一个新配置或修改现有配置。名为 ipython_config.py 的配置文件可以在 ~/.ipython/profile_default 中找到

如果默认情况下配置文件不存在，则可以通过在主目录中键入以下内容来创建它

ipython profile create 

这将在 ~/.ipython/profile_default 下创建配置文件。打开 ipython_config.py 并添加以下行：

c = get_config() #gets the configuration
c.HistoryManager.hist_file='/tmp/ipython_hist.sqlite' #changes history file writing to tmp folder

保存它并重新打开内核，它现在应该可以工作了。有关修改配置的更多详细信息，请参见此处

如果配置文件已经存在，则只需在终端中输入

ipython --HistoryManager.hist_file='/tmp/ipython_hist.sqlite'

这也应该有效。