[Samba4] Named reload causes DLZ shutdown

[Brian C. Huffman]

I've seen this a few times, and it seems to be repeatable.  If I do a 
named reload, it causes DLZ for samba to shut down, and shortly 
afterwards named itself dies:

[root at samba01 cron.daily]# /sbin/service named reload
Reloading named:                                           [  OK  ]
[root at samba01 cron.daily]# tail -21 /var/log/messages
May 21 11:14:01 samba01 named[17989]: received control channel command 
'reload'
May 21 11:14:01 samba01 named[17989]: loading configuration from 
'/etc/named.conf'
May 21 11:14:01 samba01 named[17989]: reading built-in trusted keys from 
file '/etc/named.iscdlv.key'
May 21 11:14:01 samba01 named[17989]: using default UDP/IPv4 port range: 
[1024, 65535]
May 21 11:14:01 samba01 named[17989]: using default UDP/IPv6 port range: 
[1024, 65535]
May 21 11:14:01 samba01 named[17989]: no IPv6 interfaces found
May 21 11:14:01 samba01 named[17989]: sizing zone task pool based on 6 zones
May 21 11:14:01 samba01 named[17989]: Loading 'AD DNS Zone' using driver 
dlopen
May 21 11:14:01 samba01 named[17989]: samba_dlz: started for DN 
DC=xmen,DC=eti
May 21 11:14:01 samba01 named[17989]: samba_dlz: starting configure
May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable 
zone '15.168.192.in-addr.arpa'
May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable 
zone 'xmen.eti'
May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable 
zone '_msdcs.xmen.eti'
May 21 11:14:01 samba01 named[17989]: using built-in DLV key for view 
_default
May 21 11:14:01 samba01 named[17989]: Warning: 
'empty-zones-enable/disable-empty-zone' not set: disabling RFC 1918 
empty zones
May 21 11:14:01 samba01 named[17989]: zone 15.168.192.in-addr.arpa/NONE: 
(other) removed
May 21 11:14:01 samba01 named[17989]: zone xmen.eti/NONE: (other) removed
May 21 11:14:01 samba01 named[17989]: zone _msdcs.xmen.eti/NONE: (other) 
removed
May 21 11:14:01 samba01 named[17989]: reloading configuration succeeded
May 21 11:14:01 samba01 named[17989]: reloading zones succeeded
May 21 11:14:01 samba01 named[17989]: samba_dlz: shutting down

Any ideas why this might happen?

Thanks,
Brian