Running Out of memory in a process can cause the extension handler to crash

[justusschock]

Description

If I run tail /dev/zero in a jupyterlab instance to produce an OOM, it can with ~40% probability trigger the following exception and cause all terminal tabs to close:

Traceback (most recent call last):
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/tornado/web.py", line 1298, in send_error
    self.write_error(status_code, **kwargs)
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/base/handlers.py", line 739, in write_error
    html = self.render_template("%s.html" % status_code, **ns)
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/base/handlers.py", line 667, in render_template
    return template.render(**ns)
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jinja2/environment.py", line 1304, in render
    self.environment.handle_exception()
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jinja2/environment.py", line 939, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/templates/404.html", line 1, in top-level template code
    {% extends "error.html" %}
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/templates/error.html", line 1, in top-level template code
    {% extends "page.html" %}
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/templates/page.html", line 9, in top-level template code
    {% block favicon %}<link id="favicon" rel="shortcut icon" type="image/x-icon" href="{{ static_url("favicon.ico") }}">
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/templates/page.html", line 9, in block 'favicon'
    {% block favicon %}<link id="favicon" rel="shortcut icon" type="image/x-icon" href="{{ static_url("favicon.ico") }}">
  File "/opt/jupyter/envs/main/lib/python3.10/site-packages/jupyter_server/extension/handler.py", line 118, in static_url
    raise Exception(msg) from None
Exception: This extension doesn't have any static paths listed. Check that the extension's `static_paths` trait is set.

Reproduce

• Open a jupyterlab instance
• click on the terminal card
• run tail /dev/zero
• repeat until terminal window crashes

Expected behavior

I would expect to have the command killed due to OOM, but not the server getting an exception

Context

• Operating System and version: Ubuntu 20.04
• Browser and version: Arc version 1.41.0 (Chromium Engine Version 124.0.6367.92)
• Jupyter Server version: 2.14.0

Troubleshoot Output

Paste the output from running `jupyter troubleshoot` from the command line here.
You may want to sanitize the paths in the output.

Command Line Output

Paste the output from your command line running `jupyter lab` here, use `--debug` if possible.

Browser Output

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