SviridoffA opened a new issue, #14381:
URL: https://github.com/apache/cloudstack/issues/14381
### problem
After upgrading to 4.20.3.0, the UI shows an error notification every time I
switch from a project view to the default view while the Instances page is open:
"canceled – Unable to reach the management server or a browser extension may
be blocking the Network request."
This is not a network issue: nothing is logged in management-server.log at
that moment, and the same error is shown when connecting to the management
server directly (no reverse proxy). The instance list itself loads correctly
after the switch.
The browser console shows that the in-flight listVirtualMachines request is
intentionally cancelled by the UI on route change, and the resulting
CanceledError is treated as a network failure and reported to the user:
AutogenView.vue:658 DEBUG - Due to route change, ignoring results for any
on-going API request listVirtualMachines
CancelToken.js:58 Uncaught (in promise) i {message: 'canceled', name:
'CanceledError', code: 'ERR_CANCELED', ...}
cancel @ request.js:196
beforeRouteLeave @ AutogenView.vue:659
...
push @ vue-router.esm-bundler.js:2986
changeProject @ ProjectMenu.vue:92
### versions
ACS: 4.20.3.0 (upgraded from [previous version])
Management servers: 3 nodes, Ubuntu 24.04, behind HAProxy (also reproducible
when bypassing the proxy)
Browsers/OS: reproducible in multiple browsers and operating systems
Chrome/Windows 11, Firefox/Ubuntu
### The steps to reproduce the bug
1. Log in to the UI and select a project in the project selector.
2. Open Compute > Instances (the listing is shown for the project).
3. While on the Instances page, switch from the project view to the default
view.
4. The error notification appears.
### What to do about it?
The in-flight listVirtualMachines request is cancelled in beforeRouteLeave
(AutogenView.vue) when the project is changed (changeProject in
ProjectMenu.vue). The resulting CanceledError (ERR_CANCELED) is not filtered
out and reaches the global error handler, which shows the "Unable to reach the
management server..." notification.
A deliberately cancelled request should probably be silently ignored instead
of being reported as a network error.
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