[LVS] After a LVS entry is deleted manualy by ipvsadm -d , all entries are deleted when a nanny detect a real server shutdown

Issue

After a LVS  entry  is deleted manualy  by ipvsadm -d ,  all entries are deleted when a nanny detect a real server shutdown.

Is this  a correct behavior?

Please see the following behavior

1. check  that all entries  are correct

# ipvsadm -Ln
IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.16.148.233:80 wlc
  -> 192.168.0.100:80             Masq    1      0          0         
  -> 192.168.0.200:80             Masq    1      0          0         
TCP  172.16.148.244:21 rr persistent 60
  -> 192.168.0.200:21             Masq    1      0          0         
  -> 192.168.0.100:21             Masq    1      0          0

2 . delete a entry

#  ipvsadm -d -t 172.16.148.233:80  -r 192.168.0.100:80

3. check that a entry is deleted

# ipvsadm -Ln
IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.16.148.233:80 wlc
  -> 192.168.0.200:80             Masq    1      0          0         
TCP  172.16.148.244:21 rr persistent 60
  -> 192.168.0.200:21             Masq    1      0          0         
  -> 192.168.0.100:21             Masq    1      0          0 

4.  stop a service  in a real server

In this case,  at  192.168.0.100

# service httpd stop

5.  check that all entries have deleted

# ipvsadm -Ln
IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

6. check  the /var/log/message

Aug 30 10:47:17 rhel4-cluster1 nanny[4745]: shutting down 192.168.0.100:80 due to connection failure
Aug 30 10:47:17 rhel4-cluster1 nanny[4745]: /sbin/ipvsadm command failed!
Aug 30 10:47:17 rhel4-cluster1 lvs[4732]: nanny for child HTTP/S-INWWW5 died! shutting down lvs
Aug 30 10:47:17 rhel4-cluster1 lvs[4732]: shutting down virtual service HTTP
Aug 30 10:47:17 rhel4-cluster1 nanny[4746]: Terminating due to signal 15
Aug 30 10:47:17 rhel4-cluster1 lvs[4732]: shutting down virtual service FTP
Aug 30 10:47:17 rhel4-cluster1 nanny[4748]: Terminating due to signal 15
Aug 30 10:47:17 rhel4-cluster1 nanny[4749]: Terminating due to signal 15