Bug 1497985

Description of problem:

I use the rsyslog to record logs. After upgrding from rhel7u2 to rhel7u4, I found there is the following unkown logs entried in /var/log/messages. But there is no such error in rhel7u2.  rsyslog use v7 version in rhel7u2 and v8 version in rhel7u4.

~~~
Sep 22 15:25:01 <user.info> test yum[7218]:Updated: rsyslog-8.24.0-12.el7.x86_64
Sep 22 15:25:45 <user.info> test yum[7218]:Updated: rsyslog-mmjsonparse-8.24.0-12.el7.x86_64
Sep 23 00:18:01 <syslog.err> test rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Sep 23 08:39:01 <syslog.err> test rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Sep 23 17:00:01 <syslog.err> test rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Sep 24 01:23:02 <syslog.err> test rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
~~~


Version-Release number of selected component (if applicable):

3.10.0-693.2.2.el7.x86_64(rhel7u4)
rsyslog-8.24.0-12.el7.x86_64
systemd-219-42.el7_4.1.x86_64

How reproducible:

I could re-produce this error in rhel7u4 environment from time to time. Below are my steps:

Steps to Reproduce:

1. Use default rsyslog setting; Run "for i in `seq 1 3000`;do logger -p local5.info "modify syslog rate limit modify 1640: $i" ;done" for six times.

2. Check the rsyslog output logs in /var/log/messages

PS: Since these error logs come out in /var/log/messages from time to time, it might need to run the above command for times. 

Actual results(two entries in /var/log/messages):

[root@rhel7u4 ~]# grep imjournal /var/log/messages
Oct  2 23:37:39 <syslog.err> rhel7u4 rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Oct  2 23:38:55 <syslog.err> rhel7u4 rsyslogd:imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]

Expected results:

There is no such error in daily running. Is it rsyslog bug or something else?

Additional info:

In rhel7u2,rhel7u2, system use rsyslog v7. But in rhel7u4, it upgrade to rsyslog v8.