[ovirt-users] strange dns request since 4.4.3

Hi ovirt Recently, my samba internal dns has been getting a lot of errors, like: [2020/12/02 15:24:31.484073,  1] ../../source4/dns_server/dns_query.c:1141(dns_server_process_query_got_auth)   dns_server_process_query_got_auth: Failed to add SOA record: WERR_DNS_ERROR_RCODE_FORMAT_ERROR I found that my ovirt nodes was sending a lot of strange requests, I use tcpdump and got some like: tcpdump -i ovirtmgmt udp port 53 17:00:23.875038 IP ovirt1.adagene.cn.53862 > dc1.mydomain.com.domain: 35727+ [1au] NS? . (40) 17:00:24.436466 IP 192.168.49.195.domain > ovirt1.mydomain.com.33625: 8887 FormErr-$ 0/0/1 (40) about one request in a second. And I noticed that some nodes which version is 4.4.2 did't send dns requests like above. therefore no error occured. Were there any recent changes to ovirt node that caused these errors?