This is a bug report.

Versions tested:

• Notebook 5.2.2 on python 2.7 on RedHat Enterprise Linux 6.9 and Windows 7
• Notebook 5.2.1 on python 2.7 on Windows 7

Reproduce steps:

1. Install Jupyter notebooks with "pip installing jupyter"
2. Generate a config file with "jupyter notebook --generate-config"
3. Set a password in c.NotebookApp.password in .jupyter/jupyter_notebook_config.py
4. Set a base URL in c.NotebookApp.base_url in .jupyter/jupyter_notebook_config.py
5. Run "jupyter --notebook"
6. Login with password, and click logout, then login again. You'll see the user isn't logged out. Closing the browser doesn't help. The cookie is still present.

If I don't set a base_url (step 4 above), then the logout and cookie clearing works normally.

Can someone confirm this behavior? I tried on both Windows and Linux in my environment and hit this bug.