Re: Pgpool-II 4.7.0 released.

Hi all,

We are trying to upgrade our application to use Pgpool-II 4.7.0, but
the change for 'Enhance security for watchdog and heartbeat receiver.'
is causing issues for us. We run Pgpool in a docker container and
expose some of its ports to specific IP-addresses on the hosts:
172.29.30.1, 172.29.30.2 and 172.29.30.3 for the 3 hosts. However,
from the perspective of docker container in which Pgpool is running,
there's only the IP assigned to the container by docker. With 4.7.0,
Pgpool tries to bind the wd_port to its external IP address, which is
not possible from inside the container, resulting in the following
errors:

2025-12-29 10:11:05: pid 8: LOG: setting the local watchdog node name
to "172.29.30.1:5432 Linux 9ade096c54fb"
2025-12-29 10:11:05: pid 8: LOG: watchdog cluster is configured with
1 remote nodes
2025-12-29 10:11:05: pid 8: LOG: watchdog remote node:0 on 172.29.30.2:9009
2025-12-29 10:11:05: pid 8: LOG: interface monitoring is disabled in watchdog
2025-12-29 10:11:05: pid 8: LOG: setting up watchdog receive socket
for 172.29.30.1:9009
2025-12-29 10:11:05: pid 8: LOG: failed to create watchdog receive
socket. retrying...
2025-12-29 10:11:05: pid 8: DETAIL: bind on "172.29.30.1:9009" failed
with reason: "Address not available"
2025-12-29 10:11:06: pid 8: LOG: failed to create watchdog receive
socket. retrying...
2025-12-29 10:11:06: pid 8: DETAIL: bind on "172.29.30.1:9009" failed
with reason: "Address not available"
2025-12-29 10:11:07: pid 8: LOG: failed to create watchdog receive
socket. retrying...
2025-12-29 10:11:07: pid 8: DETAIL: bind on "172.29.30.1:9009" failed
with reason: "Address not available"
2025-12-29 10:11:08: pid 8: LOG: failed to create watchdog receive
socket. retrying...
2025-12-29 10:11:08: pid 8: DETAIL: bind on "172.29.30.1:9009" failed
with reason: "Address not available"
2025-12-29 10:11:09: pid 8: LOG: failed to create watchdog receive
socket. retrying...
2025-12-29 10:11:09: pid 8: DETAIL: bind on "172.29.30.1:9009" failed
with reason: "Address not available"
2025-12-29 10:11:10: pid 8: LOG: failed to create watchdog receive socket
2025-12-29 10:11:10: pid 8: DETAIL: bind on 172.29.30.1:9009 failed
2025-12-29 10:11:10: pid 8: FATAL: failed to create any of watchdog
receive sockets
2025-12-29 10:11:10: pid 1: DEBUG: reaper handler
2025-12-29 10:11:10: pid 1: DEBUG: watchdog child process with pid: 8
exit with FATAL ERROR. pgpool-II will be shutdown
2025-12-29 10:11:10: pid 1: DEBUG: watchdog child process with pid: 8
exits with status 768
2025-12-29 10:11:10: pid 1: FATAL: watchdog child process exit with
fatal error. exiting pgpool-II
2025-12-29 10:11:10: pid 1: LOG: shutting down

The configuration for the watchdog and heartbeats hosts and ports is:
hostname0 = '172.29.30.1'
wd_port0 = 9009
pgpool_port0 = 5432
heartbeat_hostname0 = '172.29.30.1'
heartbeat_port0 = 9694

hostname1 = '172.29.30.2'
wd_port1 = 9009
pgpool_port1 = 5432
heartbeat_hostname1 = '172.29.30.2'
heartbeat_port1 = 9694

hostname2 = '172.29.30.3'
wd_port2 = 9009
pgpool_port2 = 5432
heartbeat_hostname2 = '172.29.30.3'
heartbeat_port2 = 9694

Is there any way to revert this behavior to the old situation, where
pgpool would bind on all IP addresses? Inside a docker container, this
is fine.

Best regards,
Emond