[Samba] DNS issue in samba 4.9.0rc3

[adam_xu at adagene.com.cn]

Hello, everyone. I just tried to compile samba 4.9.0rc3 in CentOS 7.5 with Heimdal or mit kerberos. I got the same error like :

Aug 24 09:53:23 dc1.ntbaobei.com samba[57539]:   /usr/sbin/samba_dnsupdate: ; TSIG error with server: tsig verify failure
Aug 24 09:53:23 dc1.ntbaobei.com samba[57539]: [2018/08/24 09:53:23.960760,  0] ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
Aug 24 09:53:23 dc1.ntbaobei.com samba[57539]:   /usr/sbin/samba_dnsupdate: ; TSIG error with server: tsig verify failure
Aug 24 09:53:24 dc1.ntbaobei.com samba[57539]: [2018/08/24 09:53:24.008739,  0] ../source4/dsdb/dns/dns_update.c:330(dnsupdate_nameupdate_done)
Aug 24 09:53:24 dc1.ntbaobei.com samba[57539]:   ../source4/dsdb/dns/dns_update.c:330: Failed DNS update - with error code 29

when I run "ping dc1" in shell ,it give me a correct result like:
PING dc1.mydomainname.com (192.168.42.15) 56(84) bytes of data.
64 bytes from dc1.mydomainname.com (192.168.42.15): icmp_seq=1 ttl=64 time=0.033 ms
64 bytes from dc1.mydomainname.com (192.168.42.15): icmp_seq=2 ttl=64 time=0.067 ms
...

here is my configure parameter:
./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --libdir=/usr/lib64 \
--enable-fhs --with-lockdir=/var/lib/samba/lock --with-cachedir=/var/lib/samba --with-piddir=/run \
--with-systemd --disable-cups --with-gpgme --with-system-mitkrb5 --systemd-install-services

there's no error in previous version of samba. Does anyone got the same error ?
        



yours Adam