2051614 - Happy Eyeballs doesn't fall back to native DNS when TRR-resolved addresses all fail to connect

Status: RESOLVED FIXED

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

Description

[Kershaw Chang [:kershaw]]

In the legacy connection path, nsSocketTransport::RecoverFromError re-resolves the host with TRR disabled (DISABLE_TRR | BYPASS_CACHE | REFRESH_CACHE) and retries once all TRR-resolved addresses have failed to connect, except in TRR_ONLY mode. Happy Eyeballs, by contrast, resolves once through the engine and then hands each connection a single pre-resolved address, so that fallback never runs — the engine simply reports Output::Failed with no native re-resolution.

Comment 1

[Kershaw Chang [:kershaw]]

Attachment: Bug 2051614 - Retry Happy Eyeballs with TRR disabled when TRR-resolved addresses fail to connect, r=#necko

Comment 2

[Kershaw Chang [:kershaw]]

Attachment: Bug 2051614 - Reset stale IP family preference on the winning family under Happy Eyeballs, r=#necko

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/937e91c5a255
https://hg.mozilla.org/integration/autoland/rev/53bceef0de1b
Retry Happy Eyeballs with TRR disabled when TRR-resolved addresses fail to connect, r=necko-reviewers,valentin
https://github.com/mozilla-firefox/firefox/commit/aad2f915f87d
https://hg.mozilla.org/integration/autoland/rev/cdc5d8eccd06
Reset stale IP family preference on the winning family under Happy Eyeballs, r=necko-reviewers,valentin

Comment 4

[amarc]

https://hg.mozilla.org/mozilla-central/rev/53bceef0de1b
https://hg.mozilla.org/mozilla-central/rev/cdc5d8eccd06