Debug Issues with YarnSpawner and HDFSCM

If you encounter issues while starting the server with YarnSpawner and HDFSCM, follow these steps to debug:

1. Check the YARN Logs:

   1. Use the application ID to view YARN logs:

2. Examine the JupyterHub Logs.

   • Review the JupyterHub logs located in

- Verify JupyterHub Service Status: Check the status of the JupyterHub service using the following command:

3. Inspect the JupyterHub Service Logs.

   1. Use the journalctl command to view recent logs for the JupyterHub service:

By following these steps, you should be able to identify and resolve most issues related to server startup with YarnSpawner and HDFSCM.