500: Internal server error

[adaptivejw]

Greeting,
I'm testing out Jupyterhub and using dummy-authenicator. One problem is that I cannot generate a Jupyter notebook correctly.
The web page says: 500: Internal server error. Failed to start your server. Please contact admin.
The error message says: Unhandled error starting {test_username}'s server: getpwnam(): name not found : {test_username}

I tried 0.8.0 and 0.7.2 version of Jupyterhub, both failed.

I assume this authenicator works well on your pc, could you tell me how to configure it?

Thanks!

[matteoipri]

Can you tell us more about your setup?
What spawner are you using?
Can you post your config file?

When I worked with the dummy authenticator, I remember that it didn't need any configuration. I just told JupyterHub to use it as Authenticator instead of its regular class.

[adaptivejw]

I'm running a Ubuntu 16.04.
I just installed the Jupyterhub from pip(0.8.0 from git repo), and no modification to the source code of Jupyterhub.
Then I modified the the config file as c.JupyterHub.authenticator_class = 'dummyauthenticator.DummyAuthenticator'
The thing is if I type a random username like "aaa" and no password, it will lead to the 500 error. However, if I use the ubuntu username and corresponding password, it will give me a the notebook.

Should I configure the spawner?

[matteoipri]

I have no experience with the default spawner. I use a different setup with Docker containers.
I use DockerSpawner and every user that logs in gets a personal container with the Jupyter installation on a cluster of servers in a Docker Swarm. I think that the default for Jupyter is to use the SystemSpawner, that launches the Jupyter servers for the local users.

What do you want to achieve? Multi-user setup on your personal computer or on a multitude of servers?

[adaptivejw]

Thanks for your replying!
I'm trying to prototyping a multi-user hub on my PC. I think that I need more time to understand the authentication process.

[matteoipri]

You're welcome!
I think you should take a look at the different spawners, too.
What you want to achieve can be done in several different ways.
Take a look at http://jupyterhub.readthedocs.io/en/0.7.2/ and at https://github.com/jupyterhub/jupyterhub/wiki.

[JunyongYao]

I'm running a Ubuntu 16.04.
I just installed the Jupyterhub from pip(0.8.0 from git repo), and no modification to the source code of Jupyterhub.
Then I modified the the config file as c.JupyterHub.authenticator_class = 'dummyauthenticator.DummyAuthenticator'
The thing is if I type a random username like "aaa" and no password, it will lead to the 500 error. However, if I use the ubuntu username and corresponding password, it will give me a the notebook.

Should I configure the spawner?

You can try jupyterhub-simplespawner to by pass the issue