IJulia / IPython / Jupyter combination not working

[sax25]

Hallo

[using Linux/Ubuntu14.04 + Firefox 37 + Julia 0.3.7 + IJulia 0.2.1]

My Problem:

I recently have upgraded from Python2.7 to Python3.4 and thereby (unknowingly) from IPython to Jupyter.
Since than not a single one of my IJulia notebooks is working anymore. (without throwing any error on console - and till now I haven't found any errorlog files for either julia nor pyhon)

Whats more:

• The whole Jupyter seems to be in a kind of "dead" or passive mode. I can select files from the tree-view and create new files, which both open but don't run.

• The "Run All" just skips through the complete notebook in no time and does nothing.

• It's also impossible to switch to different kernels from the Jupyter menu.
  This throws an error to the Firefox Error Console:

  TypeError: this.notebook.session.kernel is null

  Source: http://localhost:8998/static/notebook/js/kernelselector.js?v=20150402145919

  Line: 222

  (At least this is an error. It's the only one I get anywhere)

What I tried:

• I agreed to convert old notebooks to the (seemingly mandantory) new format.
• I have trusted the notebooks.
• I have checked the config files and have a Julia kernel.
• In Jupyter in the top right there is the Julia logo. Beneath is a grey dot with "Julia" beside it. Top left is the Jupyter logo. (I interpret this view as "You are using Jupyter with an Julia kernel")
• Same behaviour in Chromium

Does anyone encounter a similiar problem or has any ideas to solve this??

[stevengj]

Maybe similar to #286? Try Pkg.build("IJulia")?

[sax25]

Yes, I tried that. Same result.
Also had a look both with

ipython notebook --profile julia --debug

and

ijulia.jl edit "verbose=true"

• No error messages.
• Kernel started, when I opened a new or old file.
• Kernel didn't throw any "restarting" messages.
• Kernel shuts down, when I choose "Close and Halt" in Jupyter / opened notebookfile.

Just a warning from IPython:

• UserWarning: Setting kernel_cmd is deprecated, use kernel_spec to start different kernels.

And one from IJulia:

• [W 00:32:48.870 NotebookApp] 404 GET /kernelspecs/julia%200.3/logo-64x64.png (127.0.0.1) 39.24ms referer=http://localhost:8998/notebooks/Untitled3.ipynb

[UPDATE]

oh - and a different error in Firefox' error console when opening any notebook:

• SecurityError: The operation is insecure.
  Source: http://localhost:8998/static/widgets/js/manager.js?v=20150403005034
  Line: 112

I had a look into that file. The line in question is

if (localStorage[key]) {

which tells me absolutely nothing...

[sax25]

[SOLVED]

I fixed it! (ipython/ipython#7943 helped a lot...)

Short version:

• manually ALLOW cookies for localhost via preferences (I had to do that, although localhost wasn't listet in firefox' cookie policies at all)
• ALLOW 3rd party cookies
• clear cache
• clear HTTP-auth
• drop session cookies
• drop domain cookies

And after that it works.

From the now running Jupyter I saw that the grey dot besides the kernel name obviously meant "doesn't work". Because "working" is indicated by a grey circle.
Maybe that should be changed to a red vs. green dot...

[jiahao]

Great! Thanks for the followup, I'm sure there will be others who find this solution useful.