Debugging 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:

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yarn logs -applicationId application_1732264491158_0038

2. Examine the JupyterHub Logs.
   • Review the JupyterHub logs located in

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/var/log/jupyterhub

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

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systemctl status jupyterhub.service

3. Inspect the JupyterHub Service Logs.
   1. Use the journalctl command to view recent logs for the JupyterHub service:

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journalctl -u jupyterhub -n 100 --no-pager

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