Here is some more of the log trying to restart the processes:
[05:58:47/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[05:59:47/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:00:48/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:01:48/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:02:49/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:03:49/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:04:50/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:05:50/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:06:51/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:07:51/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:08:52/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:09:52/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:09:53/53444] [MASTER] child process 53709 seems to be stuck, aborting...
[06:09:53/53444] [reap_children] child 53709 reaped.
[06:09:53/53444] [SIGCHLD] jobs left: 1
[06:09:53/53444] [MASTER] active jobs: 1, next spawn at 120 sec.
[06:10:53/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[06:11:53/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[06:11:54/53444] [MASTER] child process 53795 seems to be stuck, aborting...
[06:11:54/53444] [MASTER] spawned client 1 [PID:54736]...
[06:11:54/53444] [reap_children] child 53795 reaped.
[06:11:54/53444] [SIGCHLD] jobs left: 0
[06:11:54/54737] Using task id 1
[06:11:54/54737] Lock: update_daemon-54736.lock
[06:11:54/54737] Waiting before update (5)
[06:11:59/54737] Scheduled 50 feeds to update...
[06:11:59/54737] Base feed: http://www.theregister.co.uk/headlines.atom
[06:11:59/54737] => 1970-01-01 00:00:00, 51 2
[06:12:54/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[06:13:54/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[06:13:55/53444] [MASTER] spawned client 1 [PID:54793]...
[06:13:55/54794] Using task id 1
[06:13:55/54794] Lock: update_daemon-54793.lock
[06:13:55/54794] Waiting before update (5)
[06:14:00/54794] Scheduled 28 feeds to update...
[06:14:00/54794] Base feed: http://ledgersmbdev.blogspot.com/feeds/posts/default
[06:14:00/54794] => 2019-02-11 03:45:05.943318, 39 2
[06:14:01/54794] Purged feed 39 (60): deleted 1 articles
[06:14:01/54794] 1.0493 (sec)
[06:14:01/54794] Base feed: https://blogs.technet.microsoft.com/networking/feed/
[06:14:01/54794] => 2019-02-11 03:45:06.827931, 100 2
[06:14:04/54794] 2.6385 (sec)
[06:14:04/54794] Base feed: https://www.snellman.net/blog/rss-index.xml
[06:14:04/54794] => 2019-02-11 03:45:08.346426, 87 2
[06:14:05/54794] Purged feed 87 (60): deleted 1 articles
[06:14:05/54794] 1.4294 (sec)
[06:14:05/54794] Base feed: http://scalebsd.org/blog/atom.xml
[06:14:05/54794] => 2019-02-11 03:45:08.59288, 95 2
[06:14:06/54794] Purged feed 95 (60): deleted 0 articles
[06:14:06/54794] 0.4571 (sec)
[06:14:06/54794] Base feed: http://www.h-online.com/grand-atom.xml
[06:14:06/54794] => 2019-02-11 03:45:09.122526, 48 2
[06:14:07/54794] Purged feed 48 (60): deleted 0 articles
[06:14:07/54794] 0.8599 (sec)
[06:14:07/54794] Base feed: http://lowlatencyweb.wordpress.com/feed/
[06:14:07/54794] => 2019-02-11 03:45:09.552007, 50 2
[06:14:07/54794] Purged feed 50 (60): deleted 0 articles
[06:14:07/54794] 0.5711 (sec)
[06:14:07/54794] Base feed: http://blog.netbsd.org/tnf/feed/entries/atom
[06:14:07/54794] => 2019-02-11 03:46:58.777508, 34 2
[06:14:08/54794] Purged feed 34 (60): deleted 17 articles
[06:14:08/54794] 0.7800 (sec)
[06:14:08/54794] Base feed: https://exote.ch/blogs/aseigo/tag/kolab/rss/
[06:14:08/54794] => 2019-02-11 03:47:00.047469, 68 2
[06:14:09/54794] 0.9328 (sec)
[06:14:09/54794] Base feed: https://blog.crashed.org/rss/
[06:14:09/54794] => 2019-02-11 03:49:00.287302, 71 2
[06:14:09/54794] Purged feed 71 (60): deleted 0 articles
[06:14:09/54794] 0.5164 (sec)
[06:14:09/54794] Base feed: https://www.morganclaypool.com/action/showFeed?ui=0&mi=645rul&ai=si&jc=cac&type=etoc&feed=rss
[06:14:09/54794] => 2019-02-11 03:49:00.5928, 108 2
[06:14:10/54794] Purged feed 108 (60): deleted 0 articles
[06:14:10/54794] 0.3368 (sec)
[06:14:10/54794] Base feed: http://www.undeadly.org/cgi?action=errata
[06:14:10/54794] => 2019-02-11 03:49:01.408824, 35 2
[06:14:11/54794] Purged feed 35 (60): deleted 13 articles
[06:14:11/54794] 1.5486 (sec)
[06:14:11/54794] Base feed: http://semiaccurate.com/feed/
[06:14:11/54794] => 2019-02-11 03:49:04.611606, 83 2
[06:14:55/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:15:55/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:16:56/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:17:56/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:18:57/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:19:57/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:20:58/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:21:58/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:22:59/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:23:59/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:25:00/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:26:00/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:27:01/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:28:01/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:29:02/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:30:02/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:31:03/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:32:03/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:33:04/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:34:04/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:35:05/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:36:05/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:37:06/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:38:06/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:39:07/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:40:07/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:41:08/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:42:08/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:42:09/53444] [MASTER] child process 54736 seems to be stuck, aborting...
[06:42:09/53444] [reap_children] child 54736 reaped.
[06:42:09/53444] [SIGCHLD] jobs left: 1
[06:42:09/53444] [MASTER] active jobs: 1, next spawn at 120 sec.
[06:43:09/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[06:44:09/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[06:44:10/53444] [MASTER] child process 54793 seems to be stuck, aborting...
[06:44:10/53444] [MASTER] spawned client 1 [PID:55703]...
[06:44:10/53444] [reap_children] child 54793 reaped.
[06:44:10/53444] [SIGCHLD] jobs left: 0
[06:44:10/55704] Using task id 1
[06:44:10/55704] Lock: update_daemon-55703.lock
[06:44:10/55704] Waiting before update (5)
[06:44:15/55704] Scheduled 50 feeds to update...
[06:44:15/55704] Base feed: http://www.theregister.co.uk/headlines.atom
[06:44:15/55704] => 1970-01-01 00:00:00, 51 2
[06:45:10/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[06:46:11/53444] [MASTER] spawned client 1 [PID:55766]...
[06:46:11/55767] Using task id 1
[06:46:11/55767] Lock: update_daemon-55766.lock
[06:46:11/55767] Waiting before update (5)
[06:46:16/55767] Scheduled 28 feeds to update...
[06:46:16/55767] Base feed: http://semiaccurate.com/feed/
[06:46:16/55767] => 2019-02-11 03:49:04.611606, 83 2
[06:47:11/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:48:11/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:49:13/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:50:13/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:51:14/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:53:15/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:54:15/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:55:16/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:56:16/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:57:17/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[06:58:17/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[06:59:18/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:00:18/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:01:19/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:02:19/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:03:20/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:04:20/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:05:21/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:06:21/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:07:22/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:08:22/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:09:23/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:10:23/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:12:24/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:13:25/53444] [MASTER] active jobs: 2, next spawn at 60 sec.
[07:14:25/53444] [MASTER] active jobs: 2, next spawn at 0 sec.
[07:14:26/53444] [MASTER] child process 55703 seems to be stuck, aborting...
[07:14:26/53444] [reap_children] child 55703 reaped.
[07:14:26/53444] [SIGCHLD] jobs left: 1
[07:14:26/53444] [MASTER] active jobs: 1, next spawn at 120 sec.
[07:15:26/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[07:16:26/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[07:16:27/53444] [MASTER] child process 55766 seems to be stuck, aborting...
[07:16:27/53444] [MASTER] spawned client 1 [PID:56744]...
[07:16:27/53444] [reap_children] child 55766 reaped.
[07:16:27/53444] [SIGCHLD] jobs left: 0
[07:16:27/56745] Using task id 1
[07:16:27/56745] Lock: update_daemon-56744.lock
[07:16:27/56745] Waiting before update (5)
[07:16:32/56745] Scheduled 50 feeds to update...
[07:16:32/56745] Base feed: http://www.theregister.co.uk/headlines.atom
[07:16:32/56745] => 1970-01-01 00:00:00, 51 2
[07:18:27/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[07:18:28/53444] [MASTER] spawned client 1 [PID:56803]...
[07:18:28/56804] Using task id 1
[07:18:28/56804] Lock: update_daemon-56803.lock
[07:18:28/56804] Waiting before update (5)
[07:18:33/56804] Scheduled 25 feeds to update...
[07:18:33/56804] Base feed: https://www.talospace.com/feeds/posts/default
[07:18:33/56804] => 2019-02-11 03:49:05.241046, 102 2
[07:18:34/56804] Purged feed 102 (60): deleted 37 articles
[07:18:34/56804] 1.0541 (sec)
[07:18:34/56804] Base feed: http://feeds.feedburner.com/lenovoblogs/designmatters
[07:18:34/56804] => 2019-02-11 03:49:06.216475, 13 2
[07:18:35/56804] Purged feed 13 (60): deleted 0 articles
[07:18:35/56804] 0.7721 (sec)
[07:18:35/56804] Base feed: http://dtrace.org/blogs/ahl/feed/rss/
[07:18:35/56804] => 2019-02-11 03:49:06.644674, 66 2
[07:18:37/56804] Purged feed 66 (60): deleted 0 articles
[07:18:37/56804] 1.9963 (sec)
[07:18:37/56804] Base feed: https://feeds.feedburner.com/ServeTheHome
[07:18:37/56804] => 2019-02-11 03:59:06.318216, 80 2
[07:18:37/56804] Purged feed 80 (60): deleted 60 articles
[07:18:37/56804] 0.3950 (sec)
[07:18:37/56804] Base feed: https://hannes.nqsb.io/atom
[07:18:37/56804] => 2019-02-11 03:59:08.317465, 84 2
[07:18:41/56804] Purged feed 84 (60): deleted 1 articles
[07:18:41/56804] 4.1535 (sec)
[07:18:41/56804] Base feed: http://feeds.feedburner.com/Phoronix
[07:18:41/56804] => 2019-02-11 03:59:08.447287, 41 2
[07:18:42/56804] Purged feed 41 (60): deleted 528 articles
[07:18:42/56804] 0.5198 (sec)
[07:18:42/56804] Base feed: http://www.analograils.com/xml/everything.xml
[07:18:42/56804] => 2019-02-11 03:59:09.824562, 8 2
[07:18:44/56804] Purged feed 8 (60): deleted 0 articles
[07:18:44/56804] 1.9795 (sec)
[07:18:44/56804] Base feed: http://blog.ignoranthack.me/?feed=rss2
[07:18:44/56804] => 2019-02-11 03:59:10.412462, 61 2
[07:18:45/56804] Purged feed 61 (60): deleted 0 articles
[07:18:45/56804] 1.1155 (sec)
[07:18:45/56804] Base feed: https://blogs.technet.microsoft.com/askcore/feed/
[07:18:45/56804] => 2019-02-11 03:59:10.566542, 101 2
[07:18:49/56804] Purged feed 101 (60): deleted 0 articles
[07:18:49/56804] 4.3791 (sec)
[07:18:49/56804] Base feed: https://wozniak.ca/blog/rss.xml
[07:18:49/56804] => 2019-02-11 03:59:11.091581, 96 2
[07:18:50/56804] Purged feed 96 (60): deleted 2 articles
[07:18:50/56804] 0.6197 (sec)
[07:18:50/56804] Base feed: http://hackingdistributed.com/hackingdistributed.atom
[07:18:50/56804] => 2019-04-08 02:58:31.537768, 20 2
[07:18:51/56804] Purged feed 20 (60): deleted 1 articles
[07:18:51/56804] 0.7697 (sec)
[07:18:51/56804] Base feed: http://blog.zabbix.com/feed/
[07:18:51/56804] => 2019-06-03 05:18:05.069854, 54 2
[07:18:51/56804] 0.8004 (sec)
[07:18:51/56804] Base feed: http://torvalds-family.blogspot.com/feeds/posts/default
[07:18:51/56804] => 2019-06-03 05:18:05.597707, 29 2
[07:18:52/56804] Purged feed 29 (60): deleted 0 articles
[07:18:52/56804] 0.4960 (sec)
[07:18:52/56804] Base feed: http://feeds.feedburner.com/foldl
[07:18:52/56804] => 2019-06-03 05:41:44.634173, 49 2
[07:18:52/56804] Purged feed 49 (60): deleted 0 articles
[07:18:52/56804] 0.1347 (sec)
[07:18:52/56804] Base feed: http://planet.gentoo.org/rss20.xml
[07:18:52/56804] => 2019-06-03 05:41:45.803646, 43 2
[07:18:53/56804] Purged feed 43 (60): deleted 0 articles
[07:18:53/56804] 0.7514 (sec)
[07:18:53/56804] Base feed: http://dtrace.org/blogs/bmc/feed/rss/
[07:18:53/56804] => 2019-06-03 05:41:48.678004, 65 2
[07:18:53/56804] 0.1910 (sec)
[07:18:53/56804] Base feed: http://ledgersmbdev.blogspot.com/feeds/posts/default
[07:18:53/56804] => 2019-06-03 06:14:01.695778, 39 2
[07:18:54/56804] Purged feed 39 (60): deleted 0 articles
[07:18:54/56804] 0.8291 (sec)
[07:18:54/56804] Base feed: https://www.snellman.net/blog/rss-index.xml
[07:18:54/56804] => 2019-06-03 06:14:05.765317, 87 2
[07:18:55/56804] Purged feed 87 (60): deleted 0 articles
[07:18:55/56804] 1.2101 (sec)
[07:18:55/56804] Base feed: http://scalebsd.org/blog/atom.xml
[07:18:55/56804] => 2019-06-03 06:14:06.224606, 95 2
[07:18:55/56804] 0.3531 (sec)
[07:18:55/56804] Base feed: http://www.h-online.com/grand-atom.xml
[07:18:55/56804] => 2019-06-03 06:14:07.085593, 48 2
[07:18:56/56804] 0.5144 (sec)
[07:18:56/56804] Base feed: http://lowlatencyweb.wordpress.com/feed/
[07:18:56/56804] => 2019-06-03 06:14:07.657781, 50 2
[07:18:56/56804] 0.4372 (sec)
[07:18:56/56804] Base feed: http://blog.netbsd.org/tnf/feed/entries/atom
[07:18:56/56804] => 2019-06-03 06:14:08.437474, 34 2
[07:18:57/56804] Purged feed 34 (60): deleted 0 articles
[07:18:57/56804] 0.5062 (sec)
[07:18:57/56804] Base feed: https://blog.crashed.org/rss/
[07:18:57/56804] => 2019-06-03 06:14:09.888622, 71 2
[07:18:57/56804] Purged feed 71 (60): deleted 0 articles
[07:18:57/56804] 0.4099 (sec)
[07:18:57/56804] Base feed: https://www.morganclaypool.com/action/showFeed?ui=0&mi=645rul&ai=si&jc=cac&type=etoc&feed=rss
[07:18:57/56804] => 2019-06-03 06:14:10.225943, 108 2
[07:18:58/56804] Purged feed 108 (60): deleted 0 articles
[07:18:58/56804] 0.3126 (sec)
[07:18:58/56804] Base feed: http://www.undeadly.org/cgi?action=errata
[07:18:58/56804] => 2019-06-03 06:14:11.773469, 35 2
[07:18:58/56804] 0.8606 (sec)
[07:18:58/56804] Processed 25 feeds in 25.5779 (sec), 1.0231 (sec/feed avg)
[07:18:58/56804] Running housekeeping tasks for user 2...
[07:18:58/56804] Sending digests, batch of max 15 users, headline limit = 1000
[07:18:58/56804] All done.
[07:18:59/53444] [reap_children] child 56803 reaped.
[07:18:59/53444] [SIGCHLD] jobs left: 1
[07:19:28/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[07:20:28/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[07:20:29/53444] [MASTER] spawned client 1 [PID:56870]...
[07:20:29/56871] Using task id 1
[07:20:29/56871] Lock: update_daemon-56870.lock
[07:20:29/56871] Waiting before update (5)
[07:20:34/56871] Scheduled 0 feeds to update...
[07:20:34/56871] Sending digests, batch of max 15 users, headline limit = 1000
[07:20:34/56871] All done.
[07:20:35/53444] [reap_children] child 56870 reaped.
[07:20:35/53444] [SIGCHLD] jobs left: 1
[07:21:29/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
[07:22:29/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[07:22:30/53444] [MASTER] spawned client 1 [PID:56948]...
[07:22:30/56949] Using task id 1
[07:22:30/56949] Lock: update_daemon-56948.lock
[07:22:30/56949] Waiting before update (5)
[07:22:35/56949] Scheduled 0 feeds to update...
[07:22:35/56949] Sending digests, batch of max 15 users, headline limit = 1000
[07:22:35/56949] All done.
[07:22:36/53444] [reap_children] child 56948 reaped.
[07:22:36/53444] [SIGCHLD] jobs left: 1
[07:23:30/53444] [MASTER] active jobs: 1, next spawn at 60 sec.
load: 7.20 cmd: tail 52597 [kqread] 7904.64r 0.01u 0.01s 0% 2000k
[07:24:30/53444] [MASTER] active jobs: 1, next spawn at 0 sec.
[07:24:31/53444] [MASTER] spawned client 1 [PID:57005]...
[07:24:31/57006] Using task id 1
[07:24:31/57006] Lock: update_daemon-57005.lock
[07:24:31/57006] Waiting before update (5)
[07:24:37/57006] Scheduled 0 feeds to update...
[07:24:37/57006] Sending digests, batch of max 15 users, headline limit = 1000
[07:24:37/57006] All done.
[07:24:38/53444] [reap_children] child 57005 reaped.
[07:24:38/53444] [SIGCHLD] jobs left: 1