Restart Jupyter Lab server running in the background

Question

I'm trying to restart a Jupyter Lab server (not just the kernels) running in the background of an AWS SageMaker notebook instance. I have already tried the following:

• Killing the server by it's process ID
  • pgrep doesn't show me the process
  • pkill can't find the process
  • ps aux shows the process ID as constantly changing
• Stopping the server through jupyter notebook stop
  • I get an SSL error and nothing happens

The only thing I've been able to do is reboot the entire instance, which isn't a great option as it can take awhile to become available again.

Edit 1:

The main reason I am trying to do this is that after installing the tqdm package and trying to use tqdm.notebook in Jupyter Lab, in order for it to display correctly I need to enable/install notebook and lab extensions. In order for these to take effect the server then needs to be restarted.

Answer 1

Try this:

1. Left hand navbar, Commands
2. Navigate to the Help section on the popout menu
3. Reset Application State

Answer 2

Both classic Jupyter and Jupyter lab live within the same process.

sudo initctl restart jupyter-server --no-wait is what AWS suggest in https://forums.aws.amazon.com/thread.jspa?messageID=917594&#917594