datashader on bokeh server

I’m trying to using holoviews, bokeh server, and datashader based somewhat on the example in issue #959. I’m getting the following error and I’m not sure how to debug it:

ERROR:bokeh.server.protocol.server_handler:error handling message Message ‘PATCH-DOC’ (revision 1): AttributeError(“‘NoneType’ object has no attribute ‘_session_callbacks’”,)

The plot shows up and looks correct but the datashading aspect on zoom does not seem to be working and throws that error.

My bokeh application code is —

import numpy as np
import holoviews as hv
from holoviews.operation.datashader import datashade
import holoviews.plotting.bokeh # noqa (Activate backend)
from bokeh.layouts import row
from bokeh.plotting import curdoc

doc = curdoc()

renderer = hv.Store.renderers['bokeh'].instance(mode='server', holomap='server')
options = hv.Store.options(backend='bokeh')

y = np.random.standard_normal(size = 2000000)
x = np.arange(len(y)) / 200000.0

curve = hv.Curve((x, y))
datashaded = datashade(curve, cmap=["blue"])

plot = renderer.get_plot(datashaded)

layout = row(plot.state)

doc.add_root(layout)

conda env —

dependencies:
- !!python/unicode
  'colorcet=0.9.1=py35_0'
- !!python/unicode
  'datashader=0.5.0=py35_0'
- !!python/unicode
  'bleach=1.5.0=py35_0'
- !!python/unicode
  'bokeh=0.12.5=py35_1'
- !!python/unicode
  'bzip2=1.0.6=vc14_3'
- !!python/unicode
  'cloudpickle=0.2.2=py35_0'
- !!python/unicode
  'colorama=0.3.9=py35_0'
- !!python/unicode
  'cycler=0.10.0=py35_0'
- !!python/unicode
  'dask=0.14.3=py35_1'
- !!python/unicode
  'datashape=0.5.4=py35_0'
- !!python/unicode
  'decorator=4.0.11=py35_0'
- !!python/unicode
  'entrypoints=0.2.2=py35_1'
- !!python/unicode
  'freetype=2.5.5=vc14_2'
- !!python/unicode
  'h5py=2.6.0=np111py35_2'
- !!python/unicode
  'hdf5=1.8.15.1=vc14_4'
- !!python/unicode
  'holoviews=1.7.0=py35_0'
- !!python/unicode
  'html5lib=0.999=py35_0'
- !!python/unicode
  'icu=57.1=vc14_0'
- !!python/unicode
  'ipykernel=4.6.1=py35_0'
- !!python/unicode
  'ipython=6.1.0=py35_0'
- !!python/unicode
  'ipython_genutils=0.2.0=py35_0'
- !!python/unicode
  'ipywidgets=6.0.0=py35_0'
- !!python/unicode
  'jedi=0.10.2=py35_2'
- !!python/unicode
  'jinja2=2.9.4=py35_0'
- !!python/unicode
  'jpeg=9b=vc14_0'
- !!python/unicode
  'jsonschema=2.6.0=py35_0'
- !!python/unicode
  'jupyter=1.0.0=py35_3'
- !!python/unicode
  'jupyter_client=5.0.1=py35_0'
- !!python/unicode
  'jupyter_console=5.1.0=py35_0'
- !!python/unicode
  'jupyter_core=4.3.0=py35_0'
- !!python/unicode
  'libpng=1.6.27=vc14_0'
- !!python/unicode
  'libtiff=4.0.6=vc14_3'
- !!python/unicode
  'llvmlite=0.18.0=py35_0'
- !!python/unicode
  'locket=0.2.0=py35_1'
- !!python/unicode
  'markupsafe=0.23=py35_2'
- !!python/unicode
  'matplotlib=2.0.2=np111py35_0'
- !!python/unicode
  'mistune=0.7.4=py35_0'
- !!python/unicode
  'mkl=11.3.3=1'
- !!python/unicode
  'multipledispatch=0.4.9=py35_0'
- !!python/unicode
  'nbconvert=5.2.1=py35_0'
- !!python/unicode
  'nbformat=4.3.0=py35_0'
- !!python/unicode
  'networkx=1.11=py35_0'
- !!python/unicode
  'notebook=5.0.0=py35_0'
- !!python/unicode
  'numba=0.33.0=np111py35_0'
- !!python/unicode
  'numpy=1.11.2=py35_0'
- !!python/unicode
  'odo=0.5.0=py35_1'
- !!python/unicode
  'olefile=0.44=py35_0'
- !!python/unicode
  'openssl=1.0.2l=vc14_0'
- !!python/unicode
  'pandas=0.20.1=np111py35_0'
- !!python/unicode
  'pandocfilters=1.4.1=py35_0'
- !!python/unicode
  'partd=0.3.8=py35_0'
- !!python/unicode
  'path.py=10.3.1=py35_0'
- !!python/unicode
  'pickleshare=0.7.4=py35_0'
- !!python/unicode
  'pillow=4.1.1=py35_0'
- !!python/unicode
  'pip=9.0.1=py35_1'
- !!python/unicode
  'prompt_toolkit=1.0.14=py35_0'
- !!python/unicode
  'pygments=2.2.0=py35_0'
- !!python/unicode
  'pyparsing=2.1.4=py35_0'
- !!python/unicode
  'pyqt=5.6.0=py35_2'
- !!python/unicode
  'python=3.5.2=0'
- !!python/unicode
  'python-dateutil=2.6.0=py35_0'
- !!python/unicode
  'pytz=2017.2=py35_0'
- !!python/unicode
  'pyyaml=3.12=py35_0'
- !!python/unicode
  'pyzmq=16.0.2=py35_0'
- !!python/unicode
  'qt=5.6.2=vc14_4'
- !!python/unicode
  'qtconsole=4.3.0=py35_0'
- !!python/unicode
  'requests=2.12.4=py35_0'
- !!python/unicode
  'scipy=0.18.1=np111py35_0'
- !!python/unicode
  'setuptools=27.2.0=py35_1'
- !!python/unicode
  'simplegeneric=0.8.1=py35_1'
- !!python/unicode
  'sip=4.18=py35_0'
- !!python/unicode
  'six=1.10.0=py35_0'
- !!python/unicode
  'sqlalchemy=1.1.6=py35_0'
- !!python/unicode
  'testpath=0.3.1=py35_0'
- !!python/unicode
  'tk=8.5.18=vc14_0'
- !!python/unicode
  'toolz=0.8.2=py35_0'
- !!python/unicode
  'tornado=4.4.2=py35_0'
- !!python/unicode
  'traitlets=4.3.2=py35_0'
- !!python/unicode
  'vs2015_runtime=14.0.25123=0'
- !!python/unicode
  'wcwidth=0.1.7=py35_0'
- !!python/unicode
  'wheel=0.29.0=py35_0'
- !!python/unicode
  'widgetsnbextension=2.0.0=py35_0'
- !!python/unicode
  'win_unicode_console=0.5=py35_0'
- !!python/unicode
  'xarray=0.9.6=py35_0'
- !!python/unicode
  'zlib=1.2.8=vc14_3'
- !!python/unicode
  'param=1.5.1=py35_0'
- pip:
  - aiofiles==0.3.0
  - aiohttp==1.2.0
  - aiohttp-cors==0.5.0
  - aiohttp-jinja2==0.13.0
  - aiopg==0.13.0
  - alembic==0.9.0
  - async-timeout==1.1.0
  - asyncpg==0.9.0
  - asyncpgsa==0.8.2
  - bkcharts==0.1
  - certifi==2017.4.17
  - chardet==3.0.3
  - freezegun==0.3.8
  - idna==2.5
  - ipython-genutils==0.2.0
  - jupyter-client==5.0.1
  - jupyter-console==5.1.0
  - jupyter-core==4.3.0
  - mako==1.0.6
  - multidict==2.1.4
  - prompt-toolkit==1.0.14
  - psycopg2==2.6.2
  - py==1.4.32
  - pyserial==3.2.1
  - pyserial-asyncio==0.3
  - pytest==3.0.6
  - pytest-aiohttp==0.1.3
  - python-editor==1.0.3
  - rx==1.5.8
  - urllib3==1.21.1
  - win-unicode-console==0.5
  - yarl==0.8.1

[philippjfr]

That said the simpler thing to do all around is this:

import numpy as np
import holoviews as hv
from holoviews.operation.datashader import datashade
import holoviews.plotting.bokeh # noqa (Activate backend)

y = np.random.standard_normal(size = 2000000)
x = np.arange(len(y)) / 200000.0

curve = hv.Curve((x, y))
datashaded = datashade(curve, cmap=["blue"])

doc = hv.renderer('bokeh').server_doc(datashaded)

[philippjfr]

Closing this as it seems to have been addressed.