This page lists frequently asked questions and frequently encountered problems, and possible solutions to them.

I can't log in

First, ensure that you have an account on the Palmetto cluster. You can request an account here. If you are repeatedly re-directed to the login page after entering your password correctly, you may need to delete your browser's cookies and try again.

I can log in, but when I click on "Spawn", nothing happens

This can happen for various reasons:

  1. If the cluster is especially busy: depending on the resources you request for your Notebook server, it may start immediately, or may be "queued". JupyterHub keeps requests in the queue for up to 5 minutes, after which your request is timed out. You may be successful if you try again after a while.

  2. Due to invalid/excessive resource requests: for example, asking for a single CPU core and 64 GB of memory is an invalid request, as single core requests are currently limited to 15 GB. It may be useful to consult the Palmetto user's guide when requesting resources.

  3. If you still can't log in, please e-mail and let us know.

I get a "503: Proxy Target Missing" error when trying to spawn a notebook server

Generally, this is OK. Try waiting a few seconds and then refreshing the current page.

I can't run the MATLAB kernel

The MATLAB kernel requires a small amount of user configuration. Please see the Configuration page for details.