Errors after reconnecting to JupyterLab

[dkangin]

How to reproduce:

• create a new JupyterLab session
• after certain time reconnect to JupyterLab and try to open the tabs and files (not sure whether it was within the timeout of one hour or not, but apparently some scripts have been logging data prior to the crash)
• this results in the pop-up windows such as: 'File load error for log / Unhandled error' (when trying to reload the python notebook or a file), or ' Error / Invalid response (500) -> Launcher Error (undefined is not an object : evaluating 'model.path')' if using Launcher-> Python(default).

This does differ from the usual behaviour during the timeout, when the session is inactive and the new JupyterLab session is initiated when trying to reload it; in the reported case, it is possible to reconnect to an old session, however this session does not let open the files or new python notebooks.

Not sure whether this error is of random nature or it appears consistently. The screenshot, showing the error when opening the kernel session, is given below:

[jacobtomlinson]

This is due to a disk space issue

[I 2019-04-25 15:40:51.771 SingleUserLabApp handlers:153] Creating new notebook in /work/revolver
[E 2019-04-25 15:40:51.772 SingleUserLabApp filemanager:485] Error while saving file: work/revolver/Untitled.ipynb database or disk is full
    Traceback (most recent call last):
      File "/opt/conda/lib/python3.6/site-packages/notebook/services/contents/filemanager.py", line 470, in save
        self.check_and_sign(nb, path)
      File "/opt/conda/lib/python3.6/site-packages/notebook/services/contents/manager.py", line 487, in check_and_sign
        self.notary.sign(nb)
      File "/opt/conda/lib/python3.6/site-packages/nbformat/sign.py", line 449, in sign
        self.store.store_signature(signature, self.algorithm)
      File "/opt/conda/lib/python3.6/site-packages/nbformat/sign.py", line 207, in store_signature
        if not self.check_signature(digest, algorithm):
      File "/opt/conda/lib/python3.6/site-packages/nbformat/sign.py", line 239, in check_signature
        (datetime.utcnow(), algorithm, digest),
    sqlite3.OperationalError: database or disk is full

[jacobtomlinson]

jupyterlab/jupyterlab#6248