Failed to load resource: the server responded with a status of 404

[MRYingLEE]

Description

In https://jtp.io/lit/lab/index.html, run "import pandas", the following error happened:

Failed to load resource: the server responded with a status of 404 ()
index.js:540 Error: Shared module @jupyterlab/debugger doesn't exist in shared scope default
at ensureExistence (consumes:19:1)
at consumes:101:1
at consumes:82:1
at webpack/sharing/consume/default/@jupyterlab/debugger (consumes:151:1)
at consumes:265:1
at Array.forEach ()
at webpack_require.f.consumes (consumes:248:1)
at ensure chunk:6:1
at Array.reduce ()
at webpack_require.e (ensure chunk:5:1)
(anonymous) @ index.js:540
/lit/api/translations/default.json:1

    Failed to load resource: the server responded with a status of 404 ()

index.es6.js:308 TypeError: object null is not iterable (cannot read property Symbol(Symbol.iterator))
at te.items (model.js:183:21)
at te.items (model.js:563:28)
at te.items (model.js:601:29)
at J._onModelRefreshed (listing.js:1686:40)
at d (index.es6.js:555:18)
at e.emit (index.es6.js:513:17)
at s.emit (index.es6.js:112:17)
at te.onRunningChanged (model.js:513:25)
at d (index.es6.js:555:18)
at e.emit (index.es6.js:513:17)
e.exceptionHandler @ index.es6.js:308
mock-socket.js:763 WebSocket connection to 'wss://jtp.io/lit/api/kernels/c5fe2f87-7770-406f-91eb-64515e61dcce/channels?session_id=e3f1f6d2-6b9a-4f2b-b36d-eb43a66e0ba8' failed
w @ mock-socket.js:763
mock-socket.js:763 WebSocket connection to 'wss://jtp.io/lit/api/kernels/c5fe2f87-7770-406f-91eb-64515e61dcce/channels?session_id=652681c8-bd2f-4c4c-8c73-f0eb9b5a5acd' failed
w @ mock-socket.js:763
index.es6.js:308 TypeError: object null is not iterable (cannot read property Symbol(Symbol.iterator))
at te.items (model.js:183:21)
at te.items (model.js:563:28)
at te.items (model.js:601:29)
at J._onModelRefreshed (listing.js:1686:40)
at d (index.es6.js:555:18)
at e.emit (index.es6.js:513:17)
at s.emit (index.es6.js:112:17)
at te.onRunningChanged (model.js:513:25)
at d (index.es6.js:555:18)
at e.emit (index.es6.js:513:17)
e.exceptionHandler @ index.es6.js:308
mock-socket.js:763 WebSocket connection to 'wss://jtp.io/lit/api/kernels/c5fe2f87-7770-406f-91eb-64515e61dcce/channels?session_id=f4ddb789-279c-4bc3-9cca-1c2c0305eea9' failed
w @ mock-socket.js:763
213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2 Uncaught (in promise) DOMException: Failed to execute 'importScripts' on 'WorkerGlobalScope': The script at 'https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/xpython_wasm.js' failed to load.
at Object.initialize (https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:10713)
at https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:10009
at new Promise ()
at new (https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:9987)
at https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:9934
at Object. (https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:11472)
at 213 (https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:11476)
at r (https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:11604)
at https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:11926
at https://jtp.io/lit/extensions/@jupyterlite/xeus-python-kernel/static/213.efd3bb893df42f78e3eb.js?v=efd3bb893df42f78e3eb:2:11934
default.js:493 Uncaught (in promise) Error: Kernel is dead
at C._sendMessage (default.js:493:19)
at C._sendKernelShellControl (default.js:448:14)
at C.sendShellMessage (default.js:424:21)
at C.requestExecute (default.js:778:21)
at e.execute (widget.js:630:31)
at e.execute (widget.js:1182:43)
at actions.js:1889:54
at actions.js:1807:50
at Array.map ()
at e.runSelected (actions.js:1807:37)

Reproduce

1. Go to https://jtp.io/lit/lab/index.html
2. Add a code cell
3. Run "import pandas".
4. See error in the console

I understand that pandas is not pre-installed. I just happened to check. It seems it is only related to the latest version.

Expected behavior

Pandas is not pre-installed, so "no module pandas available" should be mentioned.

Context

• JupyterLite version: 0.2.0rc0
• Operating System and version: Windows 11 23565.1000
• Browser and version: Edge

[jtpio]

In https://jtp.io/lit/lab/index.html, run "import pandas", the following error happened:

Thanks @MRYingLEE for reporting.

I think it could be because the test deployment (available in https://github.com/jtpio/lit) does not define an environment.yml with pandas in it?

[jtpio]

Ah actually it looks like one the extension files can't be found:

Will have a look.

[jtpio]

There is indeed a difference between 1.0.0a0 and 1.0.0a1 for the wheel size:

1.0.0a0

1.0.0a1

[jtpio]

For those landing here, #181 should have fixed it, and is released in 1.0.0a3: https://github.com/jupyterlite/xeus-python-kernel/releases/tag/v1.0.0a3