Public bug reported:

1. OS Version: Ubuntu 18.04.4 LTS

2. Package:    bind9-9.11.3+dfsg-1ubuntu1.11

3. Expected behaviour: DNS query response.


4. Observed behaviour:

At random times when the dhcp lease gets renewed named does not reply
with a response and the query will eventually time out.

System log:

DATE HH:MM:41 hosname.localdomain systemd-networkd[26198]: ens3: DHCP lease lost
DATE HH:MM:41 hosname.localdomain dbus-daemon[662]: [system] Activating via 
systemd: service name='org.freedesktop.hostname1' 
unit='dbus-org.freedesktop.hostname1.service' requested by ':1.508' (uid=100 
pid=26198 comm="/lib/systemd/systemd-networkd " label="unconfined")
DATE HH:MM:41 hosname.localdomain systemd[1]: Starting Hostname Service...
DATE HH:MM:41 hosname.localdomain systemd-networkd[26198]: ens3: DHCPv4 address 
<<IP_ADDRESS/SUBNET>> via <<GATEWAY>>>

named.log:

DATE HH:MM:41.646 network: error: binding TCP socket: address in use

Thank you for your help!

** Affects: bind9 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1862327

Title:
  BIND 9.11.3 dropping queries when dhcp lease is renewed

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