[Bug 1668771] Re: systemd-resolved negative caching for extended period of time

[Jorge Niedbalski]

** Also affects: systemd (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: systemd (Ubuntu Disco)
     Assignee: (unassigned) => Jorge Niedbalski (niedbalski)

** Changed in: systemd (Ubuntu Bionic)
     Assignee: (unassigned) => Jorge Niedbalski (niedbalski)

** Changed in: systemd (Ubuntu Xenial)
     Assignee: (unassigned) => Jorge Niedbalski (niedbalski)

** Changed in: systemd (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: systemd (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: systemd (Ubuntu Disco)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1668771

Title:
  systemd-resolved negative caching for extended period of time

Status in systemd:
  New
Status in systemd package in Ubuntu:
  In Progress
Status in systemd source package in Xenial:
  In Progress
Status in systemd source package in Bionic:
  In Progress
Status in systemd source package in Disco:
  In Progress
Status in systemd source package in Eoan:
  In Progress

Bug description:
  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.

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