net-mgmt/zabbix4-server ipmi poller eats all CPU

[Miroslav Lachman]

I upgraded Zabbix server from 4.0.4 to 4.0.7 and right after "service 
zabbix_server restart" zabbix starts to eat all CPU

last pid:  4696;  load averages:  2.11,  2.39,  2.24    up 0+00:35:43 
14:00:17
84 processes:  2 running, 82 sleeping
CPU: 32.7% user,  0.0% nice, 67.3% system,  0.0% interrupt,  0.0% idle
Mem: 312M Active, 126M Inact, 281M Wired, 200M Buf, 1243M Free
Swap: 1024M Total, 1024M Free

   PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME    WCPU COMMAND
   899 zabbix        1  81    0 63268K 14008K RUN     10:40  98.85% 
zabbix_server: ipmi poller #2 [polled 5 values, idle 5.055918 sec during 
5.080817 sec] (zabbix_server)
   769 mysql        57  20    0   540M   202M select   0:09   0.25% [mysqld]


I tried to restart Zabbix and reboot of the machine (VM in VirtualBox) 
but no change.

Are there somebody running Zabbix server 4.0.7 with IPMI pollers without 
this CPU issues?

The CPU was almost idle before upgrade.

More details can be found in this PR 238224
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238224

Kind regards
Miroslav Lachman