2026961 - [Late Beta] Perma netwerk/test/unit/test_trr_foreground_preconnect.js | Test timed out - when Gecko 151 switches to beta on 2026-05-01

Status: VERIFIED FIXED

(Core :: Networking: DNS, defect, P2)

Description

[amarc]

Central-as-beta-simulation

How to run these simulations

Failure log

• Failure snippet:

[task 2026-03-27T12:39:18.523+00:00] 12:39:18     INFO - TEST-START | netwerk/test/unit/test_trr_foreground_preconnect.js
[task 2026-03-27T12:40:18.524+00:00] 12:40:18     INFO - TEST-UNEXPECTED-TIMEOUT | netwerk/test/unit/test_trr_foreground_preconnect.js | Test timed out
[task 2026-03-27T12:40:18.524+00:00] 12:40:18     INFO - TEST-INFO took 60000ms
[task 2026-03-27T12:40:18.525+00:00] 12:40:18     INFO - >>>>>>> Begin of full log for netwerk/test/unit/test_trr_foreground_preconnect.js
[task 2026-03-27T12:40:18.528+00:00] 12:40:18     INFO - PID 478746 | [Parent 478746, Main Thread] WARNING: EnsureInit: No settings: file /builds/worker/checkouts/gecko/widget/gtk/nsLookAndFeel.cpp:1756
[task 2026-03-27T12:40:18.531+00:00] 12:40:18     INFO - PID 478746 | [Parent 478746, Main Thread] WARNING: Couldn't get the user appdata directory. Crash events may not be produced.: file /builds/worker/checkouts/gecko/toolkit/crashreporter/nsExceptionHandler.cpp:2919
[task 2026-03-27T12:40:18.534+00:00] 12:40:18     INFO - PID 478746 | start!
[task 2026-03-27T12:40:18.534+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | "37275" != null
[task 2026-03-27T12:40:18.535+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | "37275" != ""
[task 2026-03-27T12:40:18.537+00:00] 12:40:18     INFO - PID 478746 | [Parent 478746, Main Thread] WARNING: Failed to connect to client: Error calling StartServiceByName for org.freedesktop.timedate1: Launch helper exited with unknown return code 1
[task 2026-03-27T12:40:18.539+00:00] 12:40:18     INFO - PID 478746 | : file /builds/worker/checkouts/gecko/widget/gtk/nsAppShell.cpp:262
[task 2026-03-27T12:40:18.542+00:00] 12:40:18     INFO - PID 478746 | [Parent 478746, Main Thread] WARNING: Failed to connect to client: Error calling StartServiceByName for org.freedesktop.login1: Launch helper exited with unknown return code 1
[task 2026-03-27T12:40:18.544+00:00] 12:40:18     INFO - PID 478746 | : file /builds/worker/checkouts/gecko/widget/gtk/nsAppShell.cpp:262
[task 2026-03-27T12:40:18.544+00:00] 12:40:18     INFO - (xpcshell/head.js) | test MAIN run_test pending (1)
[task 2026-03-27T12:40:18.545+00:00] 12:40:18     INFO - (xpcshell/head.js) | test run_next_test 0 pending (2)
[task 2026-03-27T12:40:18.545+00:00] 12:40:18     INFO - (xpcshell/head.js) | test MAIN run_test finished (2)
[task 2026-03-27T12:40:18.545+00:00] 12:40:18     INFO - running event loop
[task 2026-03-27T12:40:18.548+00:00] 12:40:18     INFO - PID 478746 | Couldn't convert chrome URL: chrome://branding/locale/brand.properties
[task 2026-03-27T12:40:18.550+00:00] 12:40:18     INFO - PID 478746 | [Parent 478746, Main Thread] WARNING: Could not get the program name for a cubeb stream.: 'NS_SUCCEEDED(rv)', file /builds/worker/checkouts/gecko/dom/media/CubebUtils.cpp:567
[task 2026-03-27T12:40:18.550+00:00] 12:40:18     INFO - netwerk/test/unit/test_trr_foreground_preconnect.js | Starting setup
[task 2026-03-27T12:40:18.551+00:00] 12:40:18     INFO - (xpcshell/head.js) | test setup pending (2)
[task 2026-03-27T12:40:18.551+00:00] 12:40:18     INFO - (xpcshell/head.js) | test run_next_test 0 finished (2)
[task 2026-03-27T12:40:18.552+00:00] 12:40:18     INFO - "CONSOLE_MESSAGE: (info) No chrome package registered for chrome://branding/locale/brand.properties"
[task 2026-03-27T12:40:18.552+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | setup - [setup : 45] asyncResolve ok - true == true
[task 2026-03-27T12:40:18.553+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | setup - [setup : 1] Checking that this is the correct callback - "[xpconnect wrapped nsICancelable @ 0x7f0105622be0 (native @ 0x7f0105619ae0)]" == "[xpconnect wrapped nsICancelable @ 0x7f0105622be0 (native @ 0x7f0105619ae0)]"
[task 2026-03-27T12:40:18.553+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | setup - [setup : 1] Checking status - 0 == 0
[task 2026-03-27T12:40:18.553+00:00] 12:40:18     INFO - TEST-PASS | netwerk/test/unit/test_trr_foreground_preconnect.js | setup - [setup : 1] Checking result for example.com - "1.2.3.4" == "1.2.3.4"
[task 2026-03-27T12:40:18.554+00:00] 12:40:18     INFO - (xpcshell/head.js) | test run_next_test 1 pending (2)
[task 2026-03-27T12:40:18.554+00:00] 12:40:18     INFO - (xpcshell/head.js) | test setup finished (2)
[task 2026-03-27T12:40:18.555+00:00] 12:40:18     INFO - netwerk/test/unit/test_trr_foreground_preconnect.js | Starting test_speculative_connect_on_foreground
[task 2026-03-27T12:40:18.555+00:00] 12:40:18     INFO - (xpcshell/head.js) | test test_speculative_connect_on_foreground pending (2)
[task 2026-03-27T12:40:18.555+00:00] 12:40:18     INFO - (xpcshell/head.js) | test run_next_test 1 finished (2)
[task 2026-03-27T12:40:18.558+00:00] 12:40:18     INFO - PID 478746 | ExceptionHandler::GenerateDump attempting to generate:\x00/tmp/xpc-other-aymk14q4/7f5eed06-c6e0-ead0-cc6c-7b0b85cadf6e.dmp
[task 2026-03-27T12:40:18.558+00:00] 12:40:18     INFO - <<<<<<< End of full log for netwerk/test/unit/test_trr_foreground_preconnect.js
[task 2026-03-27T12:40:18.559+00:00] 12:40:18     INFO - xpcshell return code: None
[task 2026-03-27T12:40:18.559+00:00] 12:40:18    ERROR - netwerk/test/unit/test_trr_foreground_preconnect.js | Process still running after test!
[task 2026-03-27T12:40:18.559+00:00] 12:40:18     INFO - TEST-START | dom/webtransport/test/xpcshell/test_simple_conn.js

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The bug is marked as tracked for firefox151 (nightly). However, the bug still isn't assigned.

:ghess, could you please find an assignee for this tracked bug? Given that it is a regression and we know the cause, we could also simply backout the regressor. If you disagree with the tracking decision, please talk with the release managers.

For more information, please visit BugBot documentation.

Comment 2

[Lars Eggert [:lars]]

Should I let the original change ride the trains, or change the test so it doesn't fail with 151?

Comment 3

[Valentin Gosu [:valentin]]

I think the original change is riding the trains, right? network.trr.preconnect_on_foreground is true.
The question is why the test fails on beta - I expect there's another pref that is nightly-only that is causing it to fail?

Comment 4

[Lars Eggert [:lars]]

Attachment: Bug 2026961 - Force network.trr.async_connInfo in test to fix timeout on late beta r=valentin,kershaw,#necko-reviewers

Comment 5

[Lars Eggert [:lars]]

@valentin, yes network.trr.async_connInfo

Comment 6

[Sandor Molnar[:smolnar]]

Patch is working in latest beta-simulation

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/57e013f2da62
https://hg.mozilla.org/integration/autoland/rev/3d5920e7378f
Force network.trr.async_connInfo in test to fix timeout on late beta r=kershaw,necko-reviewers

Comment 8

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/3d5920e7378f

Comment 9

[Atila Butkovits]

Verified in today's beta-simulation