pfSense

Running the latest unbound (1.13.1) with the DHCP Registration setting enabled where DHCP entries get inserted in the DNS server's hostnames restarts the unbound service with new registrations. However, it does not reliably start the service back up again. This is unrelated to the segfault bug that existed with 1.13.0_2 but seems to be a new form of unreliability, as there is no segfault but the service fails to start back up anyway.

DHCP logs:
Feb 25 12:42:29 pfsense dhcpleases⁵⁵⁵⁴¹: Sending HUP signal to dns daemon(12799)
Feb 25 12:42:29 pfsense dhcpleases⁵⁵⁵⁴¹: Could not deliver signal HUP to process 12799: No such process.

DNS Logs (Restart is user intervention):
Feb 25 12:42:25 pfsense unbound¹²⁷⁹⁹: [12799:0] info: service stopped (unbound 1.13.1).
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 0: 177 queries, 86 answers from cache, 91 recursions, 1 prefetch, 0 rejected by ip ratelimiting
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 0: requestlist max 2 avg 0.119565 exceeded 0 jostled 0
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: average recursion processing time 0.215772 sec
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: histogram of recursion processing times
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: [25%]=0.0928427 median[50%]=0.194788 [75%]=0.310584
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: lower(secs) upper(secs) recursions
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.000000 0.000001 7
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.032768 0.065536 12
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.065536 0.131072 9
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.131072 0.262144 36
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.262144 0.524288 23
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.524288 1.000000 3
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 1.000000 2.000000 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 1: 2461 queries, 1512 answers from cache, 949 recursions, 15 prefetch, 0 rejected by ip ratelimiting
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 1: requestlist max 29 avg 1.70124 exceeded 0 jostled 0
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: average recursion processing time 0.190440 sec
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: histogram of recursion processing times
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: [25%]=0.0522377 median[50%]=0.118101 [75%]=0.24367
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: lower(secs) upper(secs) recursions
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.000000 0.000001 50
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.001024 0.002048 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.004096 0.008192 4
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.016384 0.032768 4
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.032768 0.065536 300
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.065536 0.131072 144
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.131072 0.262144 243
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.262144 0.524288 140
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.524288 1.000000 55
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 1.000000 2.000000 7
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 2.000000 4.000000 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 2: 1125 queries, 608 answers from cache, 517 recursions, 7 prefetch, 0 rejected by ip ratelimiting
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 2: requestlist max 35 avg 4.06489 exceeded 0 jostled 0
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: average recursion processing time 0.268351 sec
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: histogram of recursion processing times
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: [25%]=0.0637751 median[50%]=0.196608 [75%]=0.374023
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: lower(secs) upper(secs) recursions
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.000000 0.000001 28
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.032768 0.065536 107
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.065536 0.131072 54
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.131072 0.262144 139
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.262144 0.524288 140
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.524288 1.000000 43
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 1.000000 2.000000 4
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 2.000000 4.000000 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 4.000000 8.000000 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 3: 3495 queries, 2211 answers from cache, 1284 recursions, 20 prefetch, 0 rejected by ip ratelimiting
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: server stats for thread 3: requestlist max 42 avg 1.43712 exceeded 0 jostled 0
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: average recursion processing time 0.158562 sec
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: histogram of recursion processing times
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: [25%]=0.0477867 median[50%]=0.0862611 [75%]=0.20118
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: lower(secs) upper(secs) recursions
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.000000 0.000001 103
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.001024 0.002048 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.004096 0.008192 3
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.008192 0.016384 2
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.016384 0.032768 3
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.032768 0.065536 456
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.065536 0.131072 234
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.131072 0.262144 301
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.262144 0.524288 98
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 0.524288 1.000000 76
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 1.000000 2.000000 5
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 2.000000 4.000000 1
Feb 25 12:42:27 pfsense unbound¹²⁷⁹⁹: [12799:0] info: 4.000000 8.000000 1
Feb 25 12:43:26 pfsense unbound⁶¹⁶¹⁴: [61614:0] notice: init module 0: validator
Feb 25 12:43:26 pfsense unbound⁶¹⁶¹⁴: [61614:0] notice: init module 1: iterator
Feb 25 12:43:26 pfsense unbound⁶¹⁶¹⁴: [61614:0] info: start of service (unbound 1.13.1).