Unbound restarts when host joins network

[bhjitsense]

I've been trying to troubleshoot an issue where Unbound seems to restart itself whenever I bring my laptop (wireless) device online. Usually the sequence of events on the DNS log is a few dozen DNS requests (from my laptop) and then this;

Sep 9 12:11:24 	unbound 	36218:0 	debug: duplicate acl address ignored.
Sep 9 12:11:22 	unbound 	36218:0 	notice: Restart of unbound 1.9.1.
Sep 9 12:11:22 	unbound 	36218:0 	debug: cache memory msg=66072 rrset=66072 infra=8057 val=66288
Sep 9 12:11:22 	unbound 	36218:0 	info: mesh has 1 recursion states (1 with reply, 0 detached), 1 waiting replies, 0 recursion replies sent, 0 replies dropped, 0 states jostled out
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 3: requestlist max 0 avg 0 exceeded 0 jostled 0
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 3: 1 queries, 0 answers from cache, 1 recursions, 0 prefetch, 0 rejected by ip ratelimiting
Sep 9 12:11:22 	unbound 	36218:0 	debug: cache memory msg=66072 rrset=66072 infra=8057 val=66288
Sep 9 12:11:22 	unbound 	36218:0 	info: mesh has 1 recursion states (1 with reply, 0 detached), 1 waiting replies, 0 recursion replies sent, 0 replies dropped, 0 states jostled out
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 2: requestlist max 0 avg 0 exceeded 0 jostled 0
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 2: 1 queries, 0 answers from cache, 1 recursions, 0 prefetch, 0 rejected by ip ratelimiting
Sep 9 12:11:22 	unbound 	36218:0 	debug: cache memory msg=66072 rrset=66072 infra=8057 val=66288
Sep 9 12:11:22 	unbound 	36218:0 	info: mesh has 1 recursion states (1 with reply, 0 detached), 2 waiting replies, 0 recursion replies sent, 0 replies dropped, 0 states jostled out
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 1: requestlist max 1 avg 0.5 exceeded 0 jostled 0
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 1: 2 queries, 0 answers from cache, 2 recursions, 0 prefetch, 0 rejected by ip ratelimiting
Sep 9 12:11:22 	unbound 	36218:0 	debug: cache memory msg=66072 rrset=66072 infra=8057 val=66288
Sep 9 12:11:22 	unbound 	36218:0 	info: mesh has 0 recursion states (0 with reply, 0 detached), 0 waiting replies, 0 recursion replies sent, 0 replies dropped, 0 states jostled out
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 0: requestlist max 0 avg 0 exceeded 0 jostled 0
Sep 9 12:11:22 	unbound 	36218:0 	info: server stats for thread 0: 0 queries, 0 answers from cache, 0 recursions, 0 prefetch, 0 rejected by ip ratelimiting
Sep 9 12:11:22 	unbound 	36218:0 	info: service stopped (unbound 1.9.1).

I can't really tell why the service is restarting. This is a very common occurrence and sometimes take up to a minute for me to resolve anything as it restarts a few times. This only seems to happen when I open my laptop up. Anyone have any insight?

[Gertjan]

@bhjitsense said in Unbound restarts when host joins network:

Anyone have any insight?

Yep.
When a new DHCP lease comes in, and you have checked "DHCP Registration" :

then the Resolver (unbound) gets restarted.

Solution :
Define a static lease for your portable - this way it will always obtain the same IP, and .... the Resolver will know about it upfront, and doesn't get restart any more.
The "Static DHCP" should be checked.