LiveShare Jupyter Notebook output synch problem

[MattOrmianek]

Type: Bug

When I create session on mac using LiveShare, and work on Jupyter Notebook user that created this session see all output off cells (for example: output is 3 plots) and users connected to that session see limited output (for example: output for that user is only 1 of 3 plots). Checked versions of everything, also tried searching on web, nothing helps. Same problem when session is created on PC and mac user try to see output of cell. Also same problem when user is connected to web. Tried with several devices.

Extension version: 1.0.14 VS Code version: Code 1.73.1 (Universal) (6261075646f055b99068d3688932416f2346dd3b, 2022-11-09T02:08:38.961Z) OS version: Darwin arm64 22.2.0 Modes: Sandboxed: No

System Info

Item	Value
CPUs	Apple M1 Pro (10 x 24)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	5, 4, 3
Memory (System)	16.00GB (0.05GB free)
Process Argv	--crash-reporter-id 219a6e59-7038-479d-9d8e-3fcfe7c543e2
Screen Reader	no
VM	0%

A/B Experiments

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[DonJayamanne]

Thank you for filing this issue and sorry you are running into this.

• Please could you share a sample notebook that can be used to replicate this issue (with the outputs)
• Does this apply to any notebook or only a notebook that was executed while live share was in progress?

[MattOrmianek]

Thank you for answer,

• sample notebook is just python code plotting two plots, you can plot sin function twice, and it will show the problem (actually will not show second plot) (remember that code must be in one notebook cell)
• every notebook has this problem, I tried using old ones, create new, same issue, output is only one plot (what's more: when you get error or warning you will get only first message, for example: on 'server' live share site you have 2 warnings and after that 2 plots [because it plots things besides warnings]) If you need additional information, feel free to ask.

[DonJayamanne]

Please could you share a sample notebook with some easy plot with few dependencies so I can try this at my end.

[MattOrmianek]

Here it is: https://github.com/MattOrmianek/jupyter-testing/tree/main You have to install matplotlib lib for python.

[rsargent]

I believe I'm running into the same issue, and can reproduce in two steps, starting with an empty notebook.

Create an empty notebook test.ipynb, and compute a simple expression in the first cell:

Connect guest through liveshare (right window is guest):

I expect the output from the computation to appear on the guest screen, but it doesn't.

[DonJayamanne]

I'm sorry i missed this issue, will look into this shortly and try to get and update on this soon.

[DonJayamanne]

I can replicate this issue,

[arkanoid87]

Same issue here with 1.92.2 on both ends

Cell execution results are not visible on the guest

[Brian-Keith]

Ran into this issue as well today when hosting an interview with Live Share (version 1.0.5948).

Maybe a separate issue, or maybe related, but when I was testing it seemed to be related with the IPython display rendering.

For example, doing:

print('Hello World')
print('Hello World')

Will show both outputs.

However, doing:

display('Hello World')
display('Hello World')

the second block will not render for the guest.

Seems to be consistent. I don't have a Mac to test with but the same behavior occurred using Linux/Windows 10 guest systems (natively in VS Code) as well as Firefox and Chrome browsers.