"Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer" on multiple actions

[BCutlerSparkNZ]

It looks like the latest version of this extension is having trouble handling WS messages from a remote JH server.

The exceptions appear in the Jupyter extension logs - but the issue seems to be caused by the latest version of this JupyterHub extension. Reverting to the previous version resolves the issue.

Environment data

• VS Code version: 1.92.2
• Jupyter Extension version (available under the Extensions sidebar): v2024.7.0
• JupyterHub Extension version (available under the Extensions sidebar): v2024.5.1002432242
• Python Extension version (available under the Extensions sidebar): v2024.12.3
• OS (Windows | Mac | Linux distro) and version: MacOS 14.4
• Python and/or Anaconda version: 3.11
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Jupyter server running: Remote

Expected behaviour

Able to:

• Run code cells
• Restart Kernel
• Potentially other actions not tested/found

Actual behaviour

Actions never complete, and a number of Error logs are seen in Jupyter Extension logs.

Steps to reproduce:

1. Create a new notebook in VS Code
2. Select a kernel from a remote JH server using the kernel picker (succeeds)
3. Run a code cell (in this case a simple import os) - cell never completes running, sits with a "clock" icon
4. Hit "Restart" kernel button - info notification appears with message "Restarting Kernel : Python 3 (ipykernel)" and never closes.

Logs

Logs are from the Jupyter Extension.

16:04:34.541 [trace] Preferred Remote kernel for Untitled-1.ipynb is 83f9c60a-e0f1-42be-ba88-9ff73676e715
16:04:34.542 [debug] Using notebook.selectKernel to force remote kernel for Untitled-1.ipynb to 83f9c60a-e0f1-42be-ba88-9ff73676e715
16:04:34.545 [debug] No interpreter for Pylance for Notebook URI "Untitled-1.ipynb"
16:04:34.576 [trace] No controller, hence notebook communications cannot be initialized for editor Untitled-1.ipynb
16:04:36.562 [warn] Failed to switch remote kernel for Untitled-1.ipynb to 83f9c60a-e0f1-42be-ba88-9ff73676e715
16:04:42.090 [debug] KernelProvider switched kernel to id = ea9de0a6067a24771867b9a6e417e66141d0badf105dbe15bce49efdc57df5ba..python3./python./.-m#ipykernel_launcher
16:04:42.092 [trace] Registering commtarget jupyter.widget
16:04:42.093 [debug] Controller selection change completed
16:04:52.876 [debug] Handle Execution of Cells 0 for Untitled-1.ipynb
16:04:52.877 [debug] start the kernel, options.disableUI=false for Untitled-1.ipynb
16:04:52.877 [info] Starting Kernel (Python 3 (ipykernel)) for 'Untitled-1.ipynb' (disableUI=false)
16:04:53.166 [trace] createNewKernelSession ea9de0a6067a24771867b9a6e417e66141d0badf105dbe15bce49efdc57df5ba..python3./python./.-m#ipykernel_launcher
16:04:53.478 [info] https://jupyterhub.server.tld/user/~/: Kernel started: b66440f9-3cfc-4d96-a490-b81045f5655e
16:04:53.479 [trace] Waiting for idle on (kernel): b66440f9-3cfc-4d96-a490-b81045f5655e -> unknown
16:04:53.963 [trace] Got status busy in waitForIdleOnSession
16:04:53.965 [trace] Got status idle in waitForIdleOnSession
16:04:53.967 [trace] Finished waiting for idle on (kernel): b66440f9-3cfc-4d96-a490-b81045f5655e -> idle
16:04:53.968 [info] Started session for kernel startUsingRemoteKernelSpec:ea9de0a6067a24771867b9a6e417e66141d0badf105dbe15bce49efdc57df5ba..python3./python./.-m#ipykernel_launcher
16:04:53.969 [trace] Started running kernel initialization for Untitled-1.ipynb
16:04:53.972 [trace] Executing silently Code (idle) = try:\nimport ipywidgets as _VSCODE_ipywidgets\nprint("e976ee50-99ed-4aba-9b6b-9dcd5634d07d:IPy
16:04:54.079 [trace] Executing silently Code (completed) = try:\nimport ipywidgets as _VSCODE_ipywidgets\nprint("e976ee50-99ed-4aba-9b6b-9dcd5634d07d:IPy with 1 output(s)
16:04:54.081 [trace] Determined IPyWidgets Version as 8
16:04:54.083 [trace] Version of IPyWidgets 8 determined after 11.99s
16:04:54.084 [trace] Executing silently Code (idle) = def __VSCODE_inject_module():\ndef __VSCODE_call_function(function, callback, data=None):
16:04:54.172 [trace] Executing silently Code (completed) = def __VSCODE_inject_module():\ndef __VSCODE_call_function(function, callback, data=None): with 0 output(s)
16:04:54.172 [debug] Requesting Kernel info
16:04:54.173 [trace] Got Kernel info
16:04:54.173 [trace] End running kernel initialization, now waiting for idle
16:04:54.174 [trace] Waiting for idle on (kernel): b66440f9-3cfc-4d96-a490-b81045f5655e -> idle
16:04:54.174 [trace] Finished waiting for idle on (kernel): b66440f9-3cfc-4d96-a490-b81045f5655e -> idle
16:04:54.175 [trace] End running kernel initialization, session is idle
16:04:54.175 [debug] Updating preferred kernel for remote notebook b66440f9-3cfc-4d96-a490-b81045f5655e
16:04:54.175 [trace] Registering Kernel Completion Provider from kernel Python 3 (ipykernel) for language python
16:04:54.176 [debug] Start refreshing Kernel Picker (1725422694176)
16:04:54.176 [trace] IPyWidgetScriptSource.initialize
16:04:54.177 [info] Kernel successfully started
16:04:54.180 [trace] Cell Index:0 sent to kernel
16:04:54.184 [trace] Storing Preferred remote kernel for Untitled-1.ipynb is b66440f9-3cfc-4d96-a490-b81045f5655e
16:04:54.212 [trace] Executing silently Code (idle) = # Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the MIT License.\n# Sou
16:04:54.213 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.241 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.241 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.241 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.243 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.286 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.287 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.287 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.287 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.287 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:04:54.439 [trace] Disposing Jupyter Lab Helper
16:04:54.439 [trace] SessionManager - dispose contents manager
16:04:54.440 [trace] ShutdownSessionAndConnection - dispose session manager
16:04:54.440 [trace] Finished disposing Jupyter Lab Helper
16:04:54.440 [trace] UniversalRemoteKernelFinder: Writing 4 remote kernel connection metadata to cache
16:04:54.486 [trace] Disposing Jupyter Lab Helper
16:04:54.486 [trace] SessionManager - dispose contents manager
16:04:54.487 [trace] ShutdownSessionAndConnection - dispose session manager
16:04:54.487 [trace] Finished disposing Jupyter Lab Helper
16:04:54.488 [trace] UniversalRemoteKernelFinder: Writing 19 remote kernel connection metadata to cache
16:04:54.490 [trace] Disposing Jupyter Lab Helper
16:04:54.491 [trace] SessionManager - dispose contents manager
16:04:54.491 [trace] ShutdownSessionAndConnection - dispose session manager
16:04:54.491 [trace] Finished disposing Jupyter Lab Helper
16:04:54.492 [trace] UniversalRemoteKernelFinder: Writing 19 remote kernel connection metadata to cache
16:04:54.513 [debug] End refreshing Kernel Picker (1725422694176)
16:07:51.410 [debug] Restart kernel command handler for Untitled-1.ipynb
16:07:55.796 [debug] restart the kernel, options.disableUI=false for Untitled-1.ipynb
16:07:55.796 [info] Restart requested Untitled-1.ipynb
16:07:55.797 [debug] Cancel pending cells
16:07:55.797 [trace] Cell 0 completed in 0s (start: undefined, end: undefined)
16:07:55.798 [trace] Cell 0 executed successfully
16:07:55.815 [trace] Executing silently Code (restarting) = import os as _VSCODE_os\nimport sys as _VSCODE_sys\nimport builtins as _VSCODE_builtins\nif _VSCODE_o
16:07:55.963 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.003 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.033 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.473 [debug] Updating preferred kernel for remote notebook b66440f9-3cfc-4d96-a490-b81045f5655e
16:07:56.473 [info] Restarted b66440f9-3cfc-4d96-a490-b81045f5655e
16:07:56.474 [trace] Started running kernel initialization for Untitled-1.ipynb
16:07:56.474 [trace] Executing silently Code (unknown) = try:\nimport ipywidgets as _VSCODE_ipywidgets\nprint("e976ee50-99ed-4aba-9b6b-9dcd5634d07d:IPy
16:07:56.475 [trace] Storing Preferred remote kernel for Untitled-1.ipynb is b66440f9-3cfc-4d96-a490-b81045f5655e
16:07:56.907 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.946 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.947 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.947 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.947 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.948 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.948 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:56.948 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.520 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.522 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.523 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.523 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.527 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.528 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.590 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.591 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer
16:07:59.591 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer

[torbensky]

I just ran into the exact same issue today. Notebooks that were previously working weren't working today. Even a simple hello world. I could not execute a cell. When observing the logs, I also noticed the [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer error.

After a lot of troubleshooting and failing, I found that reverting the extension to version v2023.10.1003012305 solved the problem.

(looks like #68 might be a duplicate)

[KrisCien]

Same here looks like regression in newest version, reverting to version v2023.10.1003012305 solves the the problem.

[DonJayamanne]

This should now be fixed in the latest pre-release version of the Jupyter extension.
Closing as fixed, if the problem still persists, please feel free to file an issue and I'll look into that.
Please try installing the latest version of Jupyter extension 2024.10.*

[nitzanvolman]

When using the pre-release, i wasn't able to connect to my server at all - so i can't confirm this fix.
(but seems to be a different issue)

reverting to version v2023.10.1003012305 seems to solve the issue for me as well.

[alastairtree]

I got the same errors when connecting to server running Version 0.35.5 of JupyterLab. Only reverting to v2023.10* versions fixed the issue.

[hnykda]

I think there is still an issue 😢 : #74 (comment)