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Failed to connect to Bokeh server Error: Could not open websocket

See original GitHub issue

When I try to use the extension via JupyterHub I get the following websocket error

screen shot 2019-03-07 at 12 30 05 pm

I can confirm that the extension was properly installed:

$ jupyter serverextension list
config dir: /ncar/usr/jupyterhub/20190118/etc/jupyter
    dask_labextension  enabled 
    - Validating...
      dask_labextension 0.3.1 OK
    jupyterlab  enabled 
    - Validating...
      jupyterlab 0.35.4 OK
    nbserverproxy  enabled 
    - Validating...
      nbserverproxy  OK

@jhamman pointed out that he thought the websocket problem was fixed in https://github.com/bokeh/bokeh/issues/6023. I am wondering whether this has to do with dask-labextension or it is something that would need to be addressed upstream in Bokeh.

Ccing @jbaksta as he is the Jhub’s admin, and knows more about the Jhub setup than me.

Issue Analytics

State:
Created 5 years ago
Comments:23 (4 by maintainers)

Top GitHub Comments

2reactions

ian-r-rosecommented, Apr 10, 2019

Great! We are still dealing with some difficulties with the newest tornado, but once they are nailed down you should be able to update without difficulties.

2reactions

benjaminsingletoncommented, Apr 9, 2019

I believe I’ve run into this same issue. While I can start a cluster and generate a valid dashboard URL, the graphs in the panes display nothing. It appears that I cannot connect to the Bokeh server.

My setup may be somewhat unusual / complicated. I’m running JupyterLab in a Docker container that is being presented inside of an iframe (I’m using the Domino Data Lab platform). I only wanted to mention this because there may be configuration settings in Domino that might affect the behavior of this extension. I’m honestly just not sure, so I figured I’d raise the question here in case there is an obvious fix / approach to troubleshooting.

dask-jupyterlab-extension

bokeh-error

$ jupyter serverextension list
config dir: /home/ubuntu/.jupyter
    nbserverproxy  enabled
    - Validating...
      nbserverproxy  OK
config dir: /opt/conda/etc/jupyter
    dask_labextension  enabled
    - Validating...
/opt/conda/lib/python3.6/site-packages/dask_labextension/config.py:13: YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for fulldetails.
  defaults = yaml.load(f)
      dask_labextension 0.3.1 OK
    ipyparallel.nbextension  enabled
    - Validating...
      ipyparallel.nbextension  OK
    jupyterlab  enabled
    - Validating...
      jupyterlab 0.35.4 OK
    jupyterlab_latex  enabled
    - Validating...
      jupyterlab_latex 0.4.1 OK
    nbdime  enabled
    - Validating...
      nbdime 1.0.5 OK