Comment 23 for bug 1908452

We've hit this again on our production MAAS server, see below. We're in a position where we regularly need to check if our regiond processes are hung and restart them. I'd therefore like to ask for a bump in priority here. Any chance for a fix soon on the 2.9 branch? Does MAAS need simplestreams to cut a release before this fix can be picked up?

ubuntu@maas:~$ ps -ef | grep region
root 633597 633491 0 14:07 ? 00:02:28 python3 /snap/maas/11778/sbin/regiond
root 633814 633597 0 14:07 ? 00:33:34 python3 /snap/maas/11778/sbin/regiond
root 633816 633597 0 14:07 ? 00:34:25 python3 /snap/maas/11778/sbin/regiond
root 633817 633597 0 14:07 ? 00:35:24 python3 /snap/maas/11778/sbin/regiond
root 633818 633597 0 14:07 ? 00:34:17 python3 /snap/maas/11778/sbin/regiond
ubuntu 648515 648489 0 18:19 pts/0 00:00:00 grep --color=auto region
ubuntu@maas:~$ sudo strace -p 633597
strace: Process 633597 attached
epoll_wait(3, [], 10, 94) = 0
epoll_wait(3, [], 10, 0) = 0
epoll_wait(3, [], 10, 99) = 0
epoll_wait(3, [], 10, 399) = 0
epoll_wait(3, [], 10, 0) = 0
epoll_wait(3, ^Cstrace: Process 633597 detached
 <detached ...>

ubuntu@maas:~$ sudo strace -p 633814
strace: Process 633814 attached
recvfrom(30, ^Cstrace: Process 633814 detached
 <detached ...>

ubuntu@maas:~$ sudo lsof -i -a -p 633814
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
python3 633814 root 10u IPv6 696471999 0t0 TCP maas:5240->10.229.192.54:54706 (ESTABLISHED)
python3 633814 root 14u IPv6 680163730 0t0 TCP *:5251 (LISTEN)
python3 633814 root 15u IPv4 696151424 0t0 TCP localhost:51510->localhost:postgresql (ESTABLISHED)
python3 633814 root 16u IPv6 683429160 0t0 TCP maas:5240->1.general.morphis.uk.vpn:38664 (CLOSE_WAIT)
python3 633814 root 17u IPv4 680183835 0t0 TCP localhost:59674->localhost:postgresql (ESTABLISHED)
python3 633814 root 18u IPv4 696173835 0t0 TCP localhost:51520->localhost:postgresql (ESTABLISHED)
python3 633814 root 19u IPv6 680176399 0t0 TCP maas:5251->maas:45382 (CLOSE_WAIT)
python3 633814 root 20u IPv4 696078469 0t0 TCP localhost:51486->localhost:postgresql (ESTABLISHED)
python3 633814 root 21u IPv6 680176401 0t0 TCP *:5240 (LISTEN)
python3 633814 root 22u IPv4 696206297 0t0 TCP localhost:51932->localhost:postgresql (ESTABLISHED)
python3 633814 root 23u IPv6 680199940 0t0 TCP maas:5240->2.general.dannf.us.vpn:55866 (CLOSE_WAIT)
python3 633814 root 26u IPv6 680154669 0t0 TCP maas:5240->2.general.dannf.us.vpn:55848 (ESTABLISHED)
python3 633814 root 27u IPv4 696430193 0t0 TCP localhost:51948->localhost:postgresql (ESTABLISHED)
python3 633814 root 28u IPv6 680199946 0t0 TCP maas:5240->2.general.dannf.us.vpn:55868 (CLOSE_WAIT)
python3 633814 root 29u IPv4 696373443 0t0 TCP localhost:51938->localhost:postgresql (ESTABLISHED)
python3 633814 root 30u IPv4 696457905 0t0 TCP maas:49652->images-maas-io.sawo.canonical.com:http (ESTABLISHED)
python3 633814 root 31u IPv4 696394600 0t0 TCP localhost:51944->localhost:postgresql (ESTABLISHED)
python3 633814 root 32u IPv4 696155256 0t0 TCP localhost:51502->localhost:postgresql (ESTABLISHED)
ubuntu@maas:~$