Issue

Why firewalld error messages reported during firewalld restart when libvirtd is running?

Oct 22 10:50:57 rhel71 kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 22 10:50:57 rhel71 kernel: nf_conntrack version 0.5.0 (7940 buckets, 31760 max)
Oct 22 10:50:57 rhel71 kernel: ip6_tables: (C) 2000-2006 Netfilter Core Team
Oct 22 10:50:57 rhel71 kernel: Ebtables v2.0 registered
Oct 22 10:50:57 rhel71 systemd: Started firewalld - dynamic firewall daemon.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table mangle --delete POSTROUTING --out-interface virbr0 --protocol udp --destination-port 68 --jump CHECKSUM --checksum-fill' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table nat --delete POSTROUTING --source 192.168.122.0/24 --destination 224.0.0.0/24 --jump RETURN' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table nat --delete POSTROUTING --source 192.168.122.0/24 --destination 255.255.255.255/32 --jump RETURN' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table nat --delete POSTROUTING --source 192.168.122.0/24 -p tcp ! --destination 192.168.122.0/24 --jump MASQUERADE --to-ports 1024-65535' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table nat --delete POSTROUTING --source 192.168.122.0/24 -p udp ! --destination 192.168.122.0/24 --jump MASQUERADE --to-ports 1024-65535' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table nat --delete POSTROUTING --source 192.168.122.0/24 ! --destination 192.168.122.0/24 --jump MASQUERADE' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --destination 192.168.122.0/24 --out-interface virbr0 --match conntrack --ctstate ESTABLISHED,RELATED --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --source 192.168.122.0/24 --in-interface virbr0 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --in-interface virbr0 --out-interface virbr0 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --out-interface virbr0 --jump REJECT' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --in-interface virbr0 --jump REJECT' failed: iptables: No chain/target/match by that name.
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol udp --destination-port 53 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol tcp --destination-port 53 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete OUTPUT --out-interface virbr0 --protocol udp --destination-port 68 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol udp --destination-port 67 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).
Oct 22 10:50:58 rhel71 firewalld: 2015-10-22 10:50:58 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol tcp --destination-port 67 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?).