RHE8: What is the log "__ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000 error=-28" for?

Issue

• Log shows as below:

Sep 20 19:41:02 localhost avahi-daemon[11508]: Withdrawing address record for xxx.xxx.xxx.xxx on bond0.
Sep 20 19:41:02 localhost avahi-daemon[11508]: Registering new address record for xxx.xxx.xxx.xxx  on bond0.IPv4.
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:2225 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:2225 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:2225 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:2225 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:8979 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:8979 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:8979 error=-28
Sep 20 19:41:02 localhost kernel: __ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:0ad2:8979 error=-28
Sep 20 19:41:02 localhost avahi-daemon[11508]: Registering new address record for xxx.xxx.xxx.xxx  on bond0.IPv4.
Sep 20 19:41:02 localhost avahi-daemon[11508]: Withdrawing address record for xxx.xxx.xxx.xxx  on bond0.
Sep 20 19:41:02 localhost avahi-daemon[11508]: Registering new address record for xxx.xxx.xxx.xxx on bond0.IPv4.