2052794 - Transient DNS failure sticks across reload under Happy Eyeballs

Status: RESOLVED FIXED

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

Description

[Kershaw Chang [:kershaw]]

When Happy Eyeballs is enabled, a transient DNS failure that affects both address families gets negatively cached and is then reused by user-facing (high-priority) lookups, so the page keeps failing on normal reload (Ctrl+R) until the negative entry expires — only a shift-reload recovers.

Comment 1

[Kershaw Chang [:kershaw]]

Attachment: Bug 2052794 - Don't reuse a total-negative DNS result for high-priority lookups under Happy Eyeballs, r=mxinden

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/af25606c084f
https://hg.mozilla.org/integration/autoland/rev/066cf80cf11b
Don't reuse a total-negative DNS result for high-priority lookups under Happy Eyeballs, r=mxinden,necko-reviewers,sunil

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/28514e24cbfa
https://hg.mozilla.org/integration/autoland/rev/4ecf308c5d23
Revert "Bug 2052794 - Don't reuse a total-negative DNS result for high-priority lookups under Happy Eyeballs, r=mxinden,necko-reviewers,sunil" for causing bc failures at browser_search_telemetry_domain_categorization_download_timer.js

Comment 4

[rperta]

Backed out for causing bc failures at browser_search_telemetry_domain_categorization_download_timer.js
Backout link
Push with failures
Failure log(s)

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/3ef2b3157ced
https://hg.mozilla.org/integration/autoland/rev/bc13b475f545
Don't reuse a total-negative DNS result for high-priority lookups under Happy Eyeballs, r=mxinden,necko-reviewers,sunil

Comment 7

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/mozilla-central/rev/bc13b475f545