When I lunched the python3 notebook in JupyterHub, waited for long time and then only show the logo of JupyterHub and the menu toolbars without showing any cells (there are many cells in the notebook). I have shut-downed any other notebook on the hub, and also tried shutdown-restart this notebook many times, but it didn't work.
I would look for the jupyterhub server logs. You can share the log details here. Please mask any credentials in the logs before sharing it here.
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I am trying to connect from google colab to local host - it does not work,
google troubleshooting advise suggests that I should allow local Jupyter notebook to accept colab requests - how to do it ?
Screenshot from local host which confirms that requests from colab are forbidden.
There should be some config modification to allow such requests, is not it ?
Advise from colab:
How I fixed my connection issues:
If after the above commands don't work, what finally did it for me was creating a firewall rule for port 8888.
Another big one that is in the instructions in your command line but not stated on the provided Google tutorial that some people will miss is that you need to open the URL in your browser that's given to you after launching Jupyter in order for it to create the access cookie and make it valid (sort of speak).
From the screenshot you provided, make sure you have "http://localhost:8888/?token=2534..." opened in your browser that is logged in with the same account accessing colab before it will allow access to colab (a separate window or tab will usually pops up on it's own when you run the command though).
Alternatively, you can also add the --no-browser tag to prevent the need to open it in your browser
Other solutions that involve installation issues to mitigate network issues:
There were a number of other troubleshooting steps that were particular to me but dont know if will apply to you but did you have any issues when installing Jupyter?
For me, even though jupyter would still launch, there were errors when installing on Windows, and to fix those I had to replace pip with pipwin and go through the steps that way.
For example
pipwin install jupyterlabs
pipwin install jupyter_http_over_ws
And in case it helps anyone else coming across this in the future, if you're using the DOS cmd line and have issues launching jupyter, replace the "" with a "^" to indicate continuation
i.e.:
jupyter notebook --NotebookApp.allow_origin="https://colab.research.google.com" --port=8888 --NotebookApp.port_retries=0
So, im playing around with jupyter notebook, and I have this code, that i wrote yesterday:
BUt the problem is, that when i try to acces my model object the next day. Jupyter does not allow me to do that
For some reason i am not able to acces the variables in cells that i wrote i a previous session. Why is this? and how do I circumvent?
If you shut down the Jupyter Notebook service this is to be expected. Your output and cell numbers are saved in the notebook, but objects actually do not stay in memory. Notice how you have In [4]: in both screenshots. This is because you restarted the service and the second screenshot shows your 4th run of that cell since the restart.
You need to rerun the entire notebook to load everything into memory. You can use Kernel> Restart & Run All from the top menu to do this automatically.
I am a novice in the use of Python and I am using PandasBiogeme to estimate discrete choice models.
My issue is related to the Jupyter notebook. Usually when I wish to use it, I select it from the start menu of Windows 7 and automatically a new tab opens up in Chrome.
Yesterday, actually by not knowing exactly why, I logged out from Jupyter notebook and today when I launched it from the start menu the following error message appeared:
I thus decided to reinstall Anaconda, and PandasBiogeme and to update both of them.
Now when I wish to open Jupyter notebook from the start menu a prompt menu appears and suddenly disappears. Therefore I need to open the Anaconda Powershell and type
jupyter notebook
Yet, when I do this I receive the same error message I reported above
I typed in the second URL and I was then able to work again.
Yet, when I close Jupyter notebook and try to launch it again the same problem arises and I have to insert again 'a' token. I wrote 'a' token, because if I select by chance the token reported at the following URL (which has nothing to do with my work)
https://jupyter-notebook.readthedocs.io/en/stable/security.html
namely, this one:
http://localhost:8888/?token=c8de56fa4deed24899803e93c227592aef6538f93025fe01
and then Jupyter notebook works and I can carry out my estimation.
I read different posts on the possibility to set a password to avoid problems related to tokens, but only the first time I inserted the token I had the option to insert a password in in a html page, but I decided not to do it. Now I believe it could be the case.
This is something that happened overnight, without, I believe, my doing anything specifically.
This issue is driving me crazy and I would be thankful if any of you had a potential suggestion.
Many thanks.
Marco
While working on Jupyter Notebooks most actions are suddenly forbidden.
Initially, I started my Jupyter app from Anaconda without any problems, some token was created in the terminal. Now I need to enter a password.
Worst is I can't save because somehow this is a forbidden action as well.
Same for changing the title of a notebook.
Clearing browser cache doesn't make a lasting difference (FireFox).
I reinstalled both Anaconda and Jupyter without apparent effect.
Any suggestion to remove all these restrictions? Thnx
Jupyter notebooks use cookies to prevent XSRF. Therefore, cookies must be enabled in the browser for notebooks to work correctly.
I love notebooks. I love them so much that I have many of them running at the same time, often in different browsers, sometimes on different remote clients. I miss one feature: when I close the tab corresponding to a running notebook, it warns that the corresponding run will be stopped.
My question:
How do I make a jupyter notebook resume it's run even if the page is closed ?
such that I can:
re-open the tab in another browser (possibly on a remote computer such as a tablet),
restart a browser when it needs to,
close those with long running time for later inspection.
From what I understand, the client-server architecture could make that possible, but that there may be issues with multiple concurrent runs...
PS: I created an issue on GitHub
In fact, this was answered in the github issue:
takluyver commented on 26 Apr 2017: Anything already running in the
notebook will keep running, and the kernel it started for that will
stay running - so it won't lose your variables. However, any output
produced while the notebook isn't open in a browser tab is lost; there
isn't an easy way to change this until we have the notebook server
able to track the document state, which has been on the plan for ages.
Thanks!