We want to give users the ability to run classic notebook and jupyter lab separately on the same machine. I am trying to start another Instance of Jupyterhub with a different config file . Looks like the hub is starting fine , but it is not spawning a new server . Can someone confirm if this is possible to do with the Jupyterhub architecture ? I have used different ports in the second instance . Thanks J [ I 2018-08-03 11:56:04.564 JupyterHub app:1453] Hub API listening on http: //127.0.0.1:8482/hub/ [I 2018-08-03 11:56:04.567 JupyterHub app:1176] Starting proxy @ http: //*:8003/ [D 2018-08-03 11:56:04.567 JupyterHub app:1177] Proxy cmd: [ 'configurable-http-proxy', '--ip', '', '--port', '8003', '--api-ip', '127.0.0.1', '--api-port', '5433', '--default-target', 'http://127.0.0.1:8482', '--error-target', 'http://127.0.0.1:8482/hub/error' , '--log-level', 'debug', '--ssl-key', '/app/anaconda3/srv/jupyterhub.key', '--ssl-cert', '/app/anaconda3/srv/jupyterhub.crt'] 11:56:04.723 - info: [ConfigProxy] Adding route / -> http://127.0.0.1:8482 11:56:04.743 - info: [ConfigProxy] Proxying https://*:8003 to http://127.0.0.1:8482 11:56:04.744 - info: [ConfigProxy] Proxy API at http: //127.0.0.1:5433/api/routes [D 2018-08-03 11:56:04.774 JupyterHub app:1205] Proxy started and appears to be up [I 2018-08-03 11:56:04.775 JupyterHub service:220] Starting service 'cull-idle': ['python', '/app/anaconda3/bin/cull_idle_servers.py', '--timeout=172800'] [I 2018-08-03 11:56:04.779 JupyterHub service:90] Spawning python /app/ anaconda3/bin/cull_idle_servers.py --timeout=172800 [D 2018-08-03 11:56:04.782 JupyterHub spawner:584] Polling subprocess every 30s [I 2018-08-03 11:56:04.783 JupyterHub app:1485] JupyterHub is now running at http://127.0.0.1:8003/ [I 2018-08-03 11:56:04.788 JupyterHub orm:163] Adding service formgrader to proxy /services/formgrader => http://127.0.0.1:8082 [D 2018-08-03 11:56:04.789 JupyterHub orm:146] Fetching POST http: //127.0.0.1:5433/api/routes/services/formgrader 11:56:04.797 - info: [ConfigProxy] Adding route /services/formgrader -> http ://127.0.0.1:8082 11:56:04.800 - info: [ConfigProxy] 201 POST /api/routes/services/formgrader [I 2018-08-03 11:56:04.914 JupyterHub log:100] 200 GET /hub/api/users (cull- [email protected]) 13.63ms 11:56:16.622 - debug: [ConfigProxy] PROXY WEB /hub/ to http://127.0.0.1:8482 [I 2018-08-03 11:56:16.639 JupyterHub log:100] 302 GET /hub/ (@::ffff:10.21. 178.151) 3.38ms 11:56:16.708 - debug: [ConfigProxy] PROXY WEB /login to http: //127.0.0.1:8482 [I 2018-08-03 11:56:16.717 JupyterHub log:100] 302 GET /login (@::ffff:10.21 .178.151) 1.11ms 11:56:16.760 - debug: [ConfigProxy] PROXY WEB /hub/login to http: //127.0.0.1:8482 [E 2018-08-03 11:56:16.763 JupyterHub web:1548] Uncaught exception GET /hub/login (::ffff:10.21.178.151) HTTPServerRequest(protocol='https', host='c:8003', method='GET', uri= '/hub/login', version='HTTP/1.1', remote_ip='::ffff:10.21.178.151', headers ={'X-Forwarded-Host': 'server:8003', 'X-Forwarded-Proto': 'https', 'X-Forwarded-Port': '8003', 'X-Forwarded-For': '::ffff:10.21.178.151', 'Accept-Language': 'en-US,en;q=0.9', 'Accept-Encoding': 'gzip, deflate, br', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8' , 'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36', 'Upgrade-Insecure-Requests': '1', 'Connection': 'close', 'Host': 'server:8003'}) Traceback (most recent call last): File "/app/anaconda3/lib/python3.6/site-packages/tornado/web.py", line 1467, in _execute result = method(*self.path_args, **self.path_kwargs) File "/app/anaconda3/lib/python3.6/site-packages/jupyterhub/handlers/login.py", line 62, in get self.finish(self._render(username=username)) File "/app/anaconda3/lib/python3.6/site-packages/jupyterhub/handlers/login.py", line 37, in _render login_url=self.settings['login_url'], File "/app/anaconda3/lib/python3.6/site-packages/jupyterhub/handlers/base.py", line 413, in render_template template = self.get_template(name) File "/app/anaconda3/lib/python3.6/site-packages/jupyterhub/handlers/base.py", line 409, in get_template return self.settings['jinja2_env'].get_template(name) File "/app/anaconda3/lib/python3.6/site-packages/jinja2/environment.py", line 830 , in get_template
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