rsyslog is running, but nothing is output

Question

nice to meet you.

Suddenly nothing is being output in /var/log/messages, cron, secure, etc... I have not restarted rsyslog or modified /etc/rsyslog.conf, so I do not know why. Even after rebooting, the output is still not output. There are also servers that are outputting normally.

If you look at /proc/*/fd, the one that outputs correctly is

l-wx------ 1 root root 64 Apr 16  2021 8 -> /var/log/secure
l-wx------ 1 root root 64 Apr 16  2021 7 -> /var/log/maillog
l-wx------ 1 root root 64 Apr 16  2021 6 -> /var/log/cron
lrwx------ 1 root root 64 Apr 16  2021 5 -> socket:[8296]
lrwx------ 1 root root 64 Apr 16  2021 4 -> socket:[8295]
lr-x------ 1 root root 64 Apr 16  2021 3 -> /proc/kmsg
l-wx------ 1 root root 64 Apr 16  2021 2 -> /var/log/messages
lrwx------ 1 root root 64 Apr 16  2021 1 -> [eventpoll]
lrwx------ 1 root root 64 Apr 16  2021 0 -> socket:[8297]

The one that is not output is

lr-x------ 1 root root 64 May  2 05:24 3 -> /proc/kmsg
lrwx------ 1 root root 64 May  2 05:24 1 -> socket:[122587394]
lrwx------ 1 root root 64 May  2 05:24 0 -> socket:[122587391]

The rsyslog.conf is the same for both servers.

# rsyslog v5 configuration file
For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html
MODULES
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imklog   # provides kernel logging support (previously done by rklogd)
#$ModLoad immark  # provides --MARK-- message capability
Provides UDP syslog reception
#$ModLoad imudp
#$UDPServerRun 514
Provides TCP syslog reception
#$ModLoad imtcp
#$InputTCPServerRun 514
GLOBAL DIRECTIVES
Use default timestamp format
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
File syncing capability is disabled by default. This feature is usually not required,
not useful and an extreme performance hit
#$ActionFileEnableSync on
Include all config files in /etc/rsyslog.d/
$IncludeConfig /etc/rsyslog.d/*.conf
RULES
Log all kernel messages to the console.
Logging much else clutters up the screen.
#kern.*                                                 /dev/console
Log anything (except mail) of level info or higher.
Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none                /var/log/messages
The authpriv file has restricted access.
authpriv.*                                              /var/log/secure
Log all the mail messages in one place.
mail.*                                                  -/var/log/maillog
Log cron stuff
cron.*                                                  /var/log/cron
Everybody gets emergency messages
.emerg                                                 
Save news errors of level crit and higher in a special file.
uucp,news.crit                                          /var/log/spooler
Save boot messages also to boot.log
local7.*                                                /var/log/boot.log
### begin forwarding rule
The statement between the begin ... end define a SINGLE forwarding
rule. They belong together, do NOT split them. If you create multiple
forwarding rules, duplicate the whole block!
Remote Logging (we use TCP for reliable delivery)

An on-disk queue is created for this action. If the remote host is
down, messages are spooled to disk and sent when it is up again.
#$WorkDirectory /var/lib/rsyslog # where to place spool files
#$ActionQueueFileName fwdRule1 # unique name prefix for spool files
#$ActionQueueMaxDiskSpace 1g   # 1gb space limit (use as much as possible)
#$ActionQueueSaveOnShutdown on # save messages to disk on shutdown
#$ActionQueueType LinkedList   # run asynchronously
#$ActionResumeRetryCount -1    # infinite retries if host is down
remote host is: name/ip:port, e.g. 192.168.0.1:514, port optional
#. @@remote-host:514

We are unclear as to why the output has suddenly stopped.

OS: CentOS6 rsyslog: 5.8.10