with continuous object add/delete, restarting control node service is not up

R2.20 Build 115 ubuntu 14.04 Juno multinode setup

I have 3-controller node environment where 30 vns are getting added, 30 vms are spawned on them and are deleted.
Another script creates a VN, a LIF, a VMI , and then deletes it

In parallel, another script restarts the 3 control nodes randomly.
It is seen that sometimes, the control node does not come up. It says End-Of-RIB..

Prakash would update the bug with his findings. gcore of control node on one of the nodes will be in http://10.204.216.50/Docs/bugs/#

root@nodec2:/var/log/contrail# contrail-status
== Contrail Control ==
supervisor-control: active
contrail-control initializing (IFMap Server End-Of-RIB not computed)
contrail-control-nodemgr active
contrail-dns active
contrail-named active

--------------------

root@nodec1:~# cat bug-recreate.sh
device_id="fbaa5ca1-981c-4bfb-9d14-f44f2fff90d0"
mac="00:25:90:c3:09:6d"

while :
do
   neutron net-create bug-vn
   neutron subnet-create bug-vn 100.1.1.0/24
   vn_id=`neutron net-show bug-vn | grep " id " | awk '{ print $4}'`
   python config-tor-intf.py "ge-0/0/0" $device_id "ge-0/0/0.0" 0 1 $vn_id "00:25:90:c3:09:6d"
   sleep 20
   python del-lifs-vmis.py
   neutron net-delete bug-vn
   sleep 20
done

root@nodec1:~# cat test1.sh
source /etc/contrail/openstackrc

image_id="e9693c2b-f6ba-4830-a856-3e5b0f31db22"

while :
do

    for i in {1..30};
    do
           neutron net-create bugvn$i
           neutron subnet-create bugvn$i 100.$i.$i.0/24
           vn_id=`neutron net-show bugvn$i | grep " id " | awk '{ print $4}'`
           nova boot --nic net-id=$vn_id --flavor 1 --image $image_id vm_$i
    done
    for i in {1..30};
    do
           nova delete vm_$i
        done
    for i in {1..30};
    do
        neutron net-delete bugvn$i
    done

done
root@nodec1:~#
-------------------
bash-4.2$ cat restart_control1.sh
cmd="service contrail-control restart"
SSHOPT="-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null "
while :
do
   sshpass -p c0ntrail123 ssh $SSHOPT root@nodec1 $cmd
# sleep $[ ( $RANDOM % 200 ) + 1 ]s
   sshpass -p c0ntrail123 ssh $SSHOPT root@nodec2 $cmd
# sleep $[ ( $RANDOM % 200 ) + 1 ]s
   sshpass -p c0ntrail123 ssh $SSHOPT root@nodec3 $cmd
   sleep $[ ( $RANDOM % 200 ) + 1 ]s

done
bash-4.2$