The password is prompted when running a cell in Jupyter

Problem

Users may encounter an issue where a Managed Jupyter Server fails to authenticate in PyCharm, displaying the error "Authentication at http://localhost:8888 failed".

Cause

Password authentication is specified Jupyter configuration file.

Resolution

To address this issue, consider the following troubleshooting steps:

1. Verify Jupyter is Accessible Outside PyCharm: Open Jupyter in a web browser with the same URL (e.g., "http://localhost:8888") to confirm it is operational and note if a password is requested.

2. Check PyCharm’s Configuration: Ensure the Jupyter server settings in PyCharm are correctly configured: Navigate to File > Settings > Languages & Frameworks > Jupyter > Jupyter Servers in the IDE settings.

3. Review Config Files: Check the Jupyter configuration files (e.g., jupyter_notebook_config.py or jupyter_server_config.json) located in the directory output by the jupyter --config-dir command. If password authentication is enabled, you can disable it as documented in the Jupyter Server Configuration Guides.

   Usually, jupyter_notebook_config.py is located in the following locations:

• Windows: C:\Users\USERNAME\.jupyter\jupyter_notebook_config.py
• OS X: /Users/USERNAME/.jupyter/jupyter_notebook_config.py
• Linux: /home/USERNAME/.jupyter/jupyter_notebook_config.py

4. Update Configuration if Necessary: Edit the configuration file as needed to resolve authentication requirements or remove unexpected settings. If no suitable configuration file exists, you can create one or rely on default settings.

5. Restart Jupyter Server: After making adjustments, restart the Jupyter server and confirm its functionality through PyCharm.

If the issue persists after these steps, please collect logs using the "Help > Collect Logs and Diagnostic Data" feature in PyCharm and submit them to the support team for further analysis.