You have been subscribed to a public bug by Dan Streetman (ddstreet):
231-9ubuntu3
If a DNS lookup returns SERVFAIL, systemd-resolved seems to cache the
result for very long (infinity?). I have to restart systemd-resolved to
have the negative caching purged.
After SERVFAIL DNS server issue has been resolved, chromium/firefox
still returns DNS error despite host can correctly resolve the name.
** Affects: systemd
Importance: Unknown
Status: New
** Affects: systemd (Ubuntu)
Importance: High
Assignee: Jorge Niedbalski (niedbalski)
Status: In Progress
** Affects: systemd (Ubuntu Xenial)
Importance: High
Assignee: Jorge Niedbalski (niedbalski)
Status: In Progress
** Affects: systemd (Ubuntu Bionic)
Importance: High
Assignee: Jorge Niedbalski (niedbalski)
Status: In Progress
** Affects: systemd (Ubuntu Disco)
Importance: High
Assignee: Jorge Niedbalski (niedbalski)
Status: In Progress
** Affects: systemd (Ubuntu Eoan)
Importance: High
Assignee: Jorge Niedbalski (niedbalski)
Status: In Progress
** Tags: canonical-bootstack patch sts sts-sru-needed
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systemd-resolved negative caching for extended period of time
https://bugs.launchpad.net/bugs/1668771
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