Unable to install and start

[gta0anu]

Hi,

I followed all the steps present in the respective GitHub repositories.

Here are the system details:
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04

jupyter --version
4.4.0
jupyterhub --version
0.8.1
python --version
Python 2.7.12
python3 --version
Python 3.5.2
node --version
v8.9.4
npm --version
5.7.1

Facing following error while starting the jupyterhub after setting the jupyterhub_config.py

[E 2018-03-06 13:41:05.373 JupyterHub user:427] Unhandled error starting ubuntu's server: [Errno 2] No such file or directory: 'jupyterhub-labhub'

Tried looking for the file in the entire system also, no luck.

jupyter labextension install @jupyterlab/hub-extension

Getting the following warning when installing via
Command:

jupyter labextension install @jupyterlab/hub-extension

Error:

warning "@jupyterlab/json-extension > [email protected]" has unmet peer dependency "react@^0.14.0 || ^15.0.0 || ^16.0.0".
warning "@jupyterlab/json-extension > [email protected]" has unmet peer dependency "react@^15.0.0".
warning "@jupyterlab/json-extension > [email protected]" has unmet peer dependency "react-dom@^15.0.0".
warning "@jupyterlab/vdom-extension > @nteract/[email protected]" has unmet peer dependency "react@^15.6.1".
[4/4] Building fresh packages...
[-/2] ⠐ waiting...
[2/2] ⠐ canvas: gyp ERR!
[-/2] ⠐ waiting...
[-/2] ⠐ waiting...
warning Error running install script for optional dependency: "/usr/local/share/jupyter/lab/staging/node_modules/canvas: Command failed.\nExit code: 1\nCommand: node-gyp rebuild\nArguments: \nDirectory: /usr/local/share/jupyter/lab/staging/node_modules/canvas\nOutput:\ngyp info it worked if it ends with ok\ngyp info using [email protected]\ngyp info using [email protected] | linux | x64\ngyp info spawn /usr/bin/python2\ngyp info spawn args [ '/usr/lib/nodejs/node-v8.9.4/lib/node_modules/npm/node_modules/node-gyp/gyp/gyp_main.py',\ngyp info spawn args   'binding.gyp',\ngyp info spawn args   '-f',\ngyp info spawn args   'make',\ngyp info spawn args   '-I',\ngyp info spawn args   '/usr/local/share/jupyter/lab/staging/node_modules/canvas/build/config.gypi',\ngyp info spawn args   '-I',\ngyp info spawn args   '/usr/lib/nodejs/node-v8.9.4/lib/node_modules/npm/node_modules/node-gyp/addon.gypi',\ngyp info spawn args   '-I',\ngyp info spawn args   '/root/.node-gyp/8.9.4/include/node/common.gypi',\ngyp info spawn args   '-Dlibrary=shared_library',\ngyp info spawn args   '-Dvisibility=default',\ngyp info spawn args   '-Dnode_root_dir=/root/.node-gyp/8.9.4',\ngyp info spawn args   '-Dnode_gyp_dir=/usr/lib/nodejs/node-v8.9.4/lib/node_modules/npm/node_modules/node-gyp',\ngyp info spawn args   '-Dnode_lib_file=/root/.node-gyp/8.9.4/<(target_arch)/node.lib',\ngyp info spawn args   '-Dmodule_root_dir=/usr/local/share/jupyter/lab/staging/node_modules/canvas',\ngyp info spawn args   '-Dnode_engine=v8',\ngyp info spawn args   '--depth=.',\ngyp info spawn args   '--no-parallel',\ngyp info spawn args   '--generator-output',\ngyp info spawn args   'build',\ngyp info spawn args   '-Goutput_dir=.' ]\n./util/has_lib.sh: 31: ./util/has_lib.sh: pkg-config: not found\ngyp: Call to './util/has_lib.sh freetype' returned exit status 0 while in binding.gyp. while trying to load binding.gyp\ngyp ERR! configure error \ngyp ERR! stack Error: `gyp` failed with exit code: 1\ngyp ERR! stack     at ChildProcess.onCpExit (/usr/lib/nodejs/node-v8.9.4/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:336:16)\ngyp ERR! stack     at emitTwo (events.js:126:13)\ngyp ERR! stack     at ChildProcess.emit (events.js:214:7)\ngyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_psuccess Saved lockfile.

[blink1073]

Hi @gta0anu, it looks like the install went fine, but the spawner command should be jupyter-labhub instead of 'jupyterhub-labhub.

[gta0anu]

Hi @blink1073, that made it work. I want to ask one more thing, are we suppose to be able to logout from the JupyterLab? Because I am trying to logout and it just opens a new tab with JupyterHub login screen.

[blink1073]

I believe that is intentional, it has logged you out and is presenting you with the ability to log back in.

[gta0anu]

But the jupyterlab never logs out. Is it not supposed to logout?

[itcarroll]

I see the same behavior as @gta0anu, the notebooks in the jupyterlab tab remain fully active after "logout" ... which doesn't appear to do anything but open a new login tab.

[gta0anu]

Hi,

Is the jupyter lab not supposed to log out?

[liffiton]

I think PR #59 fixes the logout issue. I don't know when a new package will be uploaded to npm, though.

[blink1073]

I just pushed 0.9.1 to npm.

[gta0anu]

@blink1073 I will test out 0.9.1 and provide feedback. Thanks.

[dhirschfeld]

This can probably be closed to reduce noise in the issues list

[echyam]

I think this is related to the original issue here. The extension installed without giving me any issues, and I can run JupyterHub and JupyterLab with no problem. But I get the following error when I try to run sudo jupyterhub -f ./jupyterhub_config.py with c.Spawner.cmd = ['jupyter-labhub'] in my jupyterhub_config.py.

Unhandled error starting testuser's server: [Errno 2] No such file or directory: 'jupyter-labhub'

Would there any reason why JupyterHub can't find jupyter-labhub?

[blink1073]

Is which jupyter-labhub on the same root path as which jupyterhub?

[echyam]

which jupyterhub gives /usr/local/bin/jupyterhub
which jupyter-labhub gives /home/ubuntu/anaconda3/bin/jupyter-labhub
which jupyter gives /usr/local/bin/jupyter
We actually installed all of them using conda, so when we moved that to the front of the path, all of them now show
/home/ubuntu/anaconda3/bin/jupyter-labhub
/home/ubuntu/anaconda3/bin/jupyterhub
/home/ubuntu/anaconda3/bin/jupyter
But we're still getting the same error. What's strange is running jupyterhub alone (without putting jupyter-labhub) works fine, but running notebook and lab outside the context of jupyterhub doesn't work and they give the following error when we try to close them:

Serving notebooks from local directory: /home/ubuntu
0 active kernels 
The Jupyter Notebook is running at: http://localhost:8890/?token=ead834f6c489da53d2fbd689d7cef46faff93d39764a9a6e
Shutdown this notebook server (y/[n])? y
[C 23:14:07.930 LabApp] Shutdown confirmed
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/home/ubuntu/anaconda3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/home/ubuntu/anaconda3/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/home/ubuntu/anaconda3/lib/python3.6/site-packages/notebook/notebookapp.py", line 1075, in _confirm_exit
    ioloop.IOLoop.current().stop()
  File "/home/ubuntu/anaconda3/lib/python3.6/site-packages/zmq/eventloop/ioloop.py", line 116, in current
    loop = ioloop.IOLoop.current(*args, **kwargs)
  File "/home/ubuntu/anaconda3/lib/python3.6/site-packages/tornado/ioloop.py", line 282, in current
    loop = asyncio.get_event_loop()
  File "/home/ubuntu/anaconda3/lib/python3.6/asyncio/events.py", line 671, in get_event_loop
    return get_event_loop_policy().get_event_loop()
  File "/home/ubuntu/anaconda3/lib/python3.6/asyncio/events.py", line 583, in get_event_loop
    % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'Thread-1'.

[blink1073]

Hi @echyam, it would help to have more context about your setup. I wasn't able to replicate in Ubuntu 18.04. Would you mind filing a new issue and filling in the new bug report template?

[echyam]

I don't know what went wrong before (probably something to do with the configs), but I uninstalled everything and reinstalled it, and it worked. Thanks for your help!

[blink1073]

Glad you got sorted!