Holoviews: Datashaded scatter plots are not rerendered when linked

[anitagraser]

This seems to be a regression because it works in 1.13.4.

Using 1.14.0, the datashaded scatterplot works fine as long as it is used on its own:

map_plot = df.hvplot.scatter(x='x', y='y', datashade=True, height=300, width=400) 

but when it is linked with another plot:

hist_plot = df.where((df.SOG>0) & (df.SOG<50)).hvplot.hist("SOG",  bins=20, width=400, height=200) 
linked_plots = link_selections(map_plot + hist_plot)

the plot is not updated when the user zooms or filters:

https://github.com/anitagraser/movingpandas-examples/blob/5490b46c74fbbabb2d64c52c27bce6bbb6cca65d/tech-demos/linked-brushing.ipynb

May be related to: https://github.com/holoviz/holoviews/issues/4698

[jbednar]

I don't think it's related to #4698, because the only update that's missing in that one is an initial update; the rest of the updates work fine (on zooms, pans, etc.). Can you replicate this problem with a dataset that we can obtain, either by making that dataset downloadable or by adapting the example to use one of the datasets shipped with the hv or hvPlot examples?

[jbednar]

Also, you might first check your browser's JS console (under More Tools/Developer Tools in Chrome) to see if there are any useful error messages, as well as quitting and restarting your browser, just in case...

[anitagraser]

Here's the dataset (150MB) https://www.dropbox.com/s/dwmkyz2tvnmrsf7/aisdk_20170701.7z?dl=0

[anitagraser]

The error I get in developer tools is:

VM123:53 Python failed with the following traceback: 
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\pyviz_comms\__init__.py _handle_msg L316
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\bokeh\callbacks.py on_msg L163
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\bokeh\callbacks.py on_msg L155
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\streams.py trigger L171
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py refresh L244
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py refresh L240
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py _trigger_refresh L257
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py update L981
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py __getitem__ L446
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\bokeh\element.py update_frame L2388
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py compute_ranges L640
E:\Anaconda\envs\mpd-ex-clone\lib\site-packages\holoviews\plotting\plot.py _compute_group_range L873
    AttributeError: 'tuple' object has no attribute 'get'

[anitagraser]

Restarting Jupyter notebooks and the browser does not seem to have any effect. (Tested on Firefox and Vivaldi)

[jbednar]

Ok, that does look like a HoloViews error, then. Thanks!

[jbednar]

Thanks for the data file. I can replicate this issue using HoloViews master.

[philippjfr]

Probably related to: https://github.com/holoviz/holoviews/pull/4742

[philippjfr]

Yep, just tested, fixed after merging that PR.