Issue with Jupyter-Server-Proxy and Theia Webviews Not Rendering

JupyterHub
,
1

Hi everyone,

I’m using Jupyter-Server-Proxy to serve Theia-based IDE. Theia is running on localhost, but I’ve noticed that Jupyter Server is accessing Theia via 127.0.0.1. Since Theia supports both localhost and 127.0.0.1, everything mostly works fine, but this difference has caused issues with webview rendering.

Here’s my current Jupyter-Server-Proxy configuration:

# Add nuke-ide as default server
c.ServerApp.ip = "localhost"
c.ServerProxy.servers = {
    "ide": {
        "command": ["yarn", "--cwd", "/opt/nuke-ide", "start:browser", "-p", "{port}"],
        "absolute_url": False
    }
}
c.ServerApp.default_url = "/ide/"

The problem is that Jupyter Server is still using 127.0.0.1 to access Theia instead of localhost. I want to make sure Jupyter Server always uses localhost to connect to Theia.

Is there a way to explicitly tell Jupyter-Server-Proxy to use localhost instead of 127.0.0.1 when routing to Theia? Any suggestions would be greatly appreciated!

Thanks.

2

Jupyter Server Proxy uses localhost for proxying requests. Where do you see it is using 127.0.0.1? Could you share logs from Jupyter server and browser?

1 Like
3

It seems to be using localhost, but the rendered view is still not appearing. Here is the log—I’m not sure where the error is. Maybe my server configuration is not set up properly?

from jupyter_core.paths import jupyter_data_dir

c = get_config()
c.ServerApp.ip = "localhost"
c.ServerApp.open_browser = False
c.ServerApp.allow_remote_access = True
# Add nuke-ide as default server
c.ServerProxy.servers = {
    "ide": {
        "command": ["yarn", "start:browser", "-p", "{port}"],
        "absolute_url": False
    }
}
c.ServerApp.default_url = "/ide/"

  jupyter server --config=jupyter_server_config.py                   via 󰎙 v20.18.3 via  v3.13.2 via  jupyter 
[I 2025-03-14 19:29:26.171 ServerApp] jupyter_lsp | extension was successfully linked.
[I 2025-03-14 19:29:26.172 ServerApp] jupyter_server_proxy | extension was successfully linked.
[I 2025-03-14 19:29:26.175 ServerApp] jupyter_server_terminals | extension was successfully linked.
[I 2025-03-14 19:29:26.178 ServerApp] jupyterlab | extension was successfully linked.
[I 2025-03-14 19:29:26.180 ServerApp] notebook | extension was successfully linked.
[I 2025-03-14 19:29:26.335 ServerApp] notebook_shim | extension was successfully linked.
[I 2025-03-14 19:29:26.345 ServerApp] notebook_shim | extension was successfully loaded.
[I 2025-03-14 19:29:26.347 ServerApp] jupyter_lsp | extension was successfully loaded.
[I 2025-03-14 19:29:26.357 ServerApp] jupyter_server_proxy | extension was successfully loaded.
[I 2025-03-14 19:29:26.357 ServerApp] jupyter_server_terminals | extension was successfully loaded.
[I 2025-03-14 19:29:26.358 LabApp] JupyterLab extension loaded from /home/tahmid/.conda/envs/jupyter/lib/python3.13/site-packages/jupyterlab
[I 2025-03-14 19:29:26.358 LabApp] JupyterLab application directory is /home/tahmid/.conda/envs/jupyter/share/jupyter/lab
[I 2025-03-14 19:29:26.358 LabApp] Extension Manager is 'pypi'.
[I 2025-03-14 19:29:26.390 ServerApp] jupyterlab | extension was successfully loaded.
[I 2025-03-14 19:29:26.392 ServerApp] notebook | extension was successfully loaded.
[I 2025-03-14 19:29:26.393 ServerApp] The port 8888 is already in use, trying another port.
[I 2025-03-14 19:29:26.394 ServerApp] Serving notebooks from local directory: /mnt/Data/Tahmid/Projects/nuke-ide
[I 2025-03-14 19:29:26.394 ServerApp] Jupyter Server 2.15.0 is running at:
[I 2025-03-14 19:29:26.394 ServerApp] http://localhost:8889/ide/?token=af93caa32e2cde0983523cc7654c8d50e2880dae9ce96bf6
[I 2025-03-14 19:29:26.394 ServerApp]     http://127.0.0.1:8889/ide/?token=af93caa32e2cde0983523cc7654c8d50e2880dae9ce96bf6
[I 2025-03-14 19:29:26.394 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2025-03-14 19:29:26.396 ServerApp] 
    
    To access the server, open this file in a browser:
        file:///home/tahmid/.local/share/jupyter/runtime/jpserver-456150-open.html
    Or copy and paste one of these URLs:
        http://localhost:8889/ide/?token=af93caa32e2cde0983523cc7654c8d50e2880dae9ce96bf6
        http://127.0.0.1:8889/ide/?token=af93caa32e2cde0983523cc7654c8d50e2880dae9ce96bf6
[I 2025-03-14 19:29:26.503 ServerApp] Skipped non-installed server(s): bash-language-server, dockerfile-language-server-nodejs, javascript-typescript-langserver, jedi-language-server, julia-language-server, pyright, python-language-server, python-lsp-server, r-languageserver, sql-language-server, texlab, typescript-language-server, unified-language-server, vscode-css-languageserver-bin, vscode-html-languageserver-bin, vscode-json-languageserver-bin, yaml-language-server
yarn run v1.22.22
$ yarn --cwd applications/browser start -p 57855
$ theia start --plugins=local-dir:../../plugins -p 57855
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2025-03-14T13:29:38.298Z root INFO Backend DefaultMessagingService.initialize: 26.9 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend Object.initialize: 25.0 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend MiniBrowserBackendSecurityWarnings.initialize: 1.1 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend PluginDeployerContribution.initialize: 1.0 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend WebviewBackendSecurityWarnings.initialize: 0.7 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend HostedPluginLocalizationService.initialize: 0.7 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.299Z root INFO Backend HostedPluginReader.initialize: 0.6 ms [Finished 0.532 s after backend start]
2025-03-14T13:29:38.301Z root INFO Backend PluginLocalizationServer.initialize: 25.7 ms [Finished 0.533 s after backend start]
2025-03-14T13:29:38.308Z root INFO configured all backend app contributions
2025-03-14T13:29:38.308Z root INFO Backend WebsocketEndpoint.onStart: 1.4 ms [Finished 0.542 s after backend start]
2025-03-14T13:29:38.309Z root INFO Configuration directory URI: 'file:///home/tahmid/.nuke-ide'
2025-03-14T13:29:38.310Z root INFO Theia app listening on http://127.0.0.1:57855.
2025-03-14T13:29:38.311Z root WARN The local plugin referenced by local-dir:/home/tahmid/.nuke-ide/plugins does not exist.
2025-03-14T13:29:38.315Z root INFO Backend DefaultWorkspaceServer.onStart: 6.4 ms [Finished 0.548 s after backend start]
2025-03-14T13:29:38.315Z root INFO Backend TaskBackendApplicationContribution.onStart: 0.4 ms [Finished 0.549 s after backend start]
2025-03-14T13:29:38.392Z root INFO Backend MiniBrowserEndpoint.onStart: 0.4 ms [Finished 0.549 s after backend start]
2025-03-14T13:29:38.392Z root ERROR cannot resolve @theia/electron relative to /mnt/Data/Tahmid/Projects/nuke-ide/node_modules/@theia/core/package.json
2025-03-14T13:29:38.392Z root WARN Backend MetricsBackendApplicationContribution.onStart took longer than the expected maximum 50 milliseconds: 73.9 ms [Finished 0.623 s after backend start]
2025-03-14T13:29:38.392Z root INFO Backend Object.onStart: 3.2 ms [Finished 0.627 s after backend start]
2025-03-14T13:29:38.393Z root INFO Finished starting backend application: 0.1 ms [Finished 0.627 s after backend start]
2025-03-14T13:29:38.447Z root INFO Resolve plugins list: 135.8 ms [Finished 0.681 s after backend start]
2025-03-14T13:29:38.450Z root ERROR Failed to load plugin localization bundles from file:///mnt/Data/Tahmid/Projects/nuke-ide/plugins/ms-toolsai.jupyter/extension/./l10n. Error: ENOENT: no such file or directory, scandir '/mnt/Data/Tahmid/Projects/nuke-ide/plugins/ms-toolsai.jupyter/extension/./l10n'
2025-03-14T13:29:38.556Z root ERROR Failed to load plugin localization bundles from file:///mnt/Data/Tahmid/Projects/nuke-ide/plugins/ms-toolsai.jupyter/extension/./l10n. Error: ENOENT: no such file or directory, scandir '/mnt/Data/Tahmid/Projects/nuke-ide/plugins/ms-toolsai.jupyter/extension/./l10n'
2025-03-14T13:29:38.568Z root INFO Deploy plugins list: 256.7 ms [Finished 0.802 s after backend start]
2025-03-14T13:29:38.570Z root INFO [346eb73a-6445-4450-9711-131db2f5a937] Waiting for backend deployment: 0.4 ms [Finished 0.802 s after backend start]
2025-03-14T13:29:38.622Z root INFO [346eb73a-6445-4450-9711-131db2f5a937] Loading plugin contributions
[I 2025-03-14 19:29:40.223 ServerApp] Trying to establish websocket connection to ws://localhost:57855/socket.io/?EIO=4&transport=websocket&sid=d2dvT4oANMwMKp1QAAAA
[I 2025-03-14 19:29:40.229 ServerApp] Websocket connection established to ws://localhost:57855/socket.io/?EIO=4&transport=websocket&sid=d2dvT4oANMwMKp1QAAAA
2025-03-14T13:29:40.300Z root INFO creating connection for 19c9eef5-d010-41f5-98de-30ba5e3bd21f
2025-03-14T13:29:41.770Z root WARN Frontend CommonFrontendContribution.configure took longer than the expected maximum 100 milliseconds: 143.0 ms [Finished 19.228 s after frontend start]
2025-03-14T13:29:41.770Z root WARN A command editor.action.toggleStickyScroll is already registered.
[W 2025-03-14 19:29:41.809 ServerApp] 404 GET /hub/static/service-worker.js (b4da6aa052d94abcb3f25ae37583191d@127.0.0.1) 11.54ms referer=None
2025-03-14T13:29:41.825Z root INFO Start frontend contributions: 260.0 ms [Finished 19.295 s after frontend start]
2025-03-14T13:29:41.825Z root INFO Changed application state from 'init' to 'started_contributions'.
2025-03-14T13:29:41.825Z root INFO Changed application state from 'started_contributions' to 'attached_shell'.
2025-03-14T13:29:41.825Z root INFO >>> Restoring the layout state...
2025-03-14T13:29:41.836Z root ERROR Service Worker registration failed: TypeError: ServiceWorker script at http://localhost:8889/hub/static/service-worker.js for scope http://localhost:8889/hub/static/ encountered an error during installation.
2025-03-14T13:29:41.918Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Waiting for backend deployment: 81.0 ms [Finished 19.375 s after frontend start]
2025-03-14T13:29:42.152Z root INFO [hosted-plugin: 456564] PLUGIN_HOST(456564) starting instance
2025-03-14T13:29:42.155Z root WARN Linked preference "workbench.colorCustomizations" not found.
2025-03-14T13:29:42.367Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Sync of 75 plugins: 438.0 ms [Finished 19.813 s after frontend start]
2025-03-14T13:29:42.922Z root INFO <<< The layout has been successfully restored.
[I 2025-03-14 19:29:43.481 ServerApp] 302 GET /ide/webview/index.html?id=e36e1353-e95b-4dd9-af56-f17f1258618b (@127.0.0.1) 0.43ms
2025-03-14T13:29:43.498Z root INFO Initialize the workbench layout: 1077.0 ms [Finished 20.383 s after frontend start]
2025-03-14T13:29:43.498Z root INFO Changed application state from 'attached_shell' to 'initialized_layout'.
2025-03-14T13:29:43.498Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Loading plugin contributions
2025-03-14T13:29:43.498Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.interactive.clearAllCells',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@0',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.restartkernel',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@1',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.openVariableView',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@3',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.interactive.exportasnotebook',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@4',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.interactive.exportas',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@5',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.expandallcells',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@6',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.500Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/toolbar {
  command: 'jupyter.collapseallcells',
  submenu: undefined,
  alt: undefined,
  group: 'navigation@7',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.501Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/cell/title {
  command: 'jupyter.interactive.copyCell',
  submenu: undefined,
  alt: undefined,
  group: 'inline@0',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.501Z root WARN Failed to register a menu item for plugin ms-toolsai.jupyter contributed to interactive/cell/title {
  command: 'jupyter.interactive.goToCode',
  submenu: undefined,
  alt: undefined,
  group: 'inline@1',
  when: 'isWorkspaceTrusted && notebookKernel =~ /^ms-toolsai.jupyter\\// || isWorkspaceTrusted && !notebookKernel'
} getMenuNode@http://localhost:8889/ide/bundle.js:65390:23
../../node_modules/@theia/plugin-ext/lib/main/browser/menus/menus-contribution-handler.js/handle/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6104:66
handle@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:6098:37
../../node_modules/@theia/plugin-ext/lib/main/browser/plugin-contribution-handler.js/handleContributions/<@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:71
pushContribution@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7847:32
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:7957:25
handleContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:474:41
loadContributions@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1222:41
doLoad@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:1108:42

2025-03-14T13:29:43.501Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Load contributions of 75 plugins: 571.0 ms [Finished 20.955 s after frontend start]
2025-03-14T13:29:43.559Z root WARN 'cpp' language is remapped from 'source.cpp.embedded.macro' to 'source.cpp' scope
2025-03-14T13:29:43.559Z root WARN a registered grammar configuration for 'cpp' language is overridden
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.html]: Language for 'source.smarty' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.vs_net' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.dosbatch' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.coffee' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.objc' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.perl6' not found.
2025-03-14T13:29:43.559Z root WARN [79dad3d1-86c9-40e4-a236-ee2c10539171][vscode.markdown]: Language for 'meta.embedded.block.scala' not found.
2025-03-14T13:29:43.559Z root WARN 'php' language is remapped from 'source.php' to 'text.html.php' scope
2025-03-14T13:29:43.559Z root WARN a registered grammar configuration for 'php' language is overridden
2025-03-14T13:29:44.290Z plugin-host INFO PLUGIN_HOST(456564): PluginManagerExtImpl/init()
2025-03-14T13:29:44.290Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Starting plugins.
2025-03-14T13:29:44.337Z root INFO Replace loading indicator with ready workbench UI (animation): 836.0 ms [Finished 21.797 s after frontend start]
2025-03-14T13:29:44.337Z root INFO Changed application state from 'initialized_layout' to 'ready'.
2025-03-14T13:29:44.338Z root INFO Frontend application start: 2654.9 ms [Finished 6.572 s after backend start]
2025-03-14T13:29:44.420Z plugin-manager WARN Unsupported activation events: onProfile, onProfile:github, please open an issue: https://github.com/eclipse-theia/theia/issues/new
2025-03-14T13:29:44.420Z plugin-manager WARN Unsupported activation events: onOpenExternalUri:http, onOpenExternalUri:https, please open an issue: https://github.com/eclipse-theia/theia/issues/new
2025-03-14T13:29:44.420Z plugin-manager WARN Unsupported activation events: onWalkthrough:nodejsWelcome, please open an issue: https://github.com/eclipse-theia/theia/issues/new
2025-03-14T13:29:44.420Z plugin-manager WARN Unsupported activation events: onTunnel, please open an issue: https://github.com/eclipse-theia/theia/issues/new
2025-03-14T13:29:44.655Z root INFO [79dad3d1-86c9-40e4-a236-ee2c10539171] Start of 75 plugins: 1125.0 ms [Finished 22.111 s after frontend start]
[I 2025-03-14 19:29:53.397 ServerApp] 302 GET /ide/webview/index.html?id=158239f4-329b-41b5-a6ee-a40b10613db2 (@127.0.0.1) 0.40ms
[I 2025-03-14 19:29:53.493 ServerApp] 302 GET /ide/webview/index.html?id=012fd042-e4db-4e8a-b5ad-d0ffda8448aa (@127.0.0.1) 0.43ms
2025-03-14T13:29:54.308Z plugin-host ERROR Promise rejection not handled in one second: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b , reason: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b
2025-03-14T13:29:54.309Z plugin-host ERROR With stack trace: getWebview@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:14108:19

2025-03-14T13:29:54.309Z plugin-host ERROR Promise rejection not handled in one second: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b , reason: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b
2025-03-14T13:29:54.309Z plugin-host ERROR With stack trace: getWebview@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:14108:19

2025-03-14T13:29:54.309Z plugin-host ERROR Promise rejection not handled in one second: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b , reason: Error: Unknown Webview: e36e1353-e95b-4dd9-af56-f17f1258618b
2025-03-14T13:29:54.309Z plugin-host ERROR With stack trace: getWebview@http://localhost:8889/ide/vendors-node_modules_theia_plugin-ext_lib_hosted_browser_hosted-plugin_js.js:14108:19
4

Hmmm, I can make it work using latest JupyterLab and Jupyter Server Proxy. I am using a container to spin up Theia IDE. This is the config I used:

c = get_config()

c.ServerProxy.servers = {
    "ide": {
        "command": ["podman", "run", "-p=3000:3000", "--rm", "ghcr.io/eclipse-theia/theia-ide/theia-ide"],
        "port": 3000,
    }
}
2 Likes
5

It seems the Docker version is unable to render the output when running with JupyterServer.

Have you noticed the notebook output? For example, if you write print("Hello world"), there is no output. It only works when I start Theia without JupyterServer on localhost.

6

Resolved by adding

export THEIA_WEBVIEW_EXTERNAL_ENDPOINT={{hostname}}
2 Likes