Issue : Issue arises when there is flowfilter created for a given vnode with multiple sequence numbers and one of them is deleted when controller is in DOWN state, or deleted in the Controller.

Reproduce the scenario:

Create Controller :
curl --user admin:adminpass -H 'content-type: application/json' -X POST \
http://127.0.0.1:8083/vtn-webapi/controllers.json \
-d '{"controller": {"controller_id": "controller1", "ipaddr":"10.100.9.61", "type": "odc", "version": "1.0", "auditstatus":"enable"}}'

Create vtn:
curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"vtn" : {"vtn_name":"vtn_one","description":"test VTN" }}' http://127.0.0.1:8083/vtn-webapi/vtns.json

Create vbr:
curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"vbridge" : {"vbr_name":"vbr_two","controller_id":"controller1","domain_id":"(DEFAULT)" }}' \
http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges.json

Create interfaces:
curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"interface": {"if_name": "if1","description": "if_desc1"}}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces.json

curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"interface": {"if_name": "if2","description": "if_desc1"}}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces.json

Portmapping:

curl --user admin:adminpass -H 'content-type: application/json' -X PUT -d \
'{"portmap":{"logical_port_id": "PP-OF:openflow:3-s3-eth1"}}' \
http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/portmap.json

curl --user admin:adminpass -H 'content-type: application/json' -X PUT -d \
'{"portmap":{"logical_port_id": "PP-OF:openflow:2-s2-eth1"}}' \
http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if2/portmap.json

Create Flowlist:
curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"flowlist": {"fl_name": "flowlist1", "ip_version":"IP"}}' http://127.0.0.1:8083/vtn-webapi/flowlists.json

curl --user admin:adminpass -H 'content-type: application/json' -X POST -d \
'{"flowlistentry": {"seqnum": "233","macethertype": "0x800","ipdstaddr": "10.0.0.1","ipdstaddrprefix": "24","ipsrcaddr": "10.0.0.3","ipsrcaddrprefix": "24","ipproto": "1"}}' \
http://127.0.0.1:8083/vtn-webapi/flowlists/flowlist1/flowlistentries.json

Create Flowfilter:
curl --user admin:adminpass -X POST -H 'content-type: application/json' -d \
'{"flowfilter" : {"ff_type": "in"}}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters.json

curl --user admin:adminpass -X POST -H 'content-type: application/json' -d \
'{"flowfilterentry": {"seqnum": "233", "fl_name": "flowlist1", "action_type":"drop", "priority":"3", "dscp":"55" }}' \
http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries.json

Now disable audit for the controller:
curl -v --user admin:adminpass -H 'content-type: application/json' -X PUT http://127.0.0.1:8083/vtn-webapi/controllers/controller1.json -d '{"controller": {"controller_id": "controller1", "ipaddr":"10.106.138.191", "type": "odc", "version": "1.0", "auditstatus":"disable"}}'

Create another flowfilter with different sequence number for the same interface when controller in Down state:

curl --user admin:adminpass -X POST -H 'content-type: application/json' -d '{"flowfilterentry": {"seqnum": "231", "fl_name": "flowlist1", "action_type":"drop", "priority":"3", "dscp":"55" }}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries.json

curl -v --user admin:adminpass -X POST -H 'content-type: application/json' -d '{"flowfilterentry": {"seqnum": "230", "fl_name": "flowlist1", "action_type":"drop", "priority":"3", "dscp":"55" }}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries.json

Delete the flowfilter with sequence number 233:

curl -v --user admin:adminpass -X DELETE -H 'content-type: application/json' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries/233.json

Now enable audit in controller:

curl -v --user admin:adminpass -H 'content-type: application/json' -X PUT http://127.0.0.1:8083/vtn-webapi/controllers/controller1.json -d '{"controller": {"controller_id": "controller1", "ipaddr":"10.106.138.191", "type": "odc", "version": "1.0", "auditstatus":"enable"}}'

When flowfilter is fetched in coordinator:
curl -v --user admin:adminpass -X GET -H 'content-type: application/json' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries.json

• About to connect() to 127.0.0.1 port 8083 (#0)
• Trying 127.0.0.1...
• Connected to 127.0.0.1 (127.0.0.1) port 8083 (#0)
• Server auth using Basic with user 'admin'
  > GET /vtn-webapi/vtns/vtn_one/vbridges/vbr_two/interfaces/if1/flowfilters/in/flowfilterentries.json HTTP/1.1
  > Authorization: Basic YWRtaW46YWRtaW5wYXNz
  > User-Agent: curl/7.29.0
  > Host: 127.0.0.1:8083
  > Accept: /
  > content-type: application/json
  >
  < HTTP/1.1 200 OK
  < Server: Apache-Coyote/1.1
  < Content-Type: application/json;charset=UTF-8
  < Content-Length: 57
  < Date: Tue, 15 Mar 2016 17:36:13 GMT
  <
• Connection #0 to host 127.0.0.1 left intact
  Unknown macro: {"flowfilterentries"}

  [root@localhost coordinator]#

When flowfitler is fetched in the ODL controller:

curl --user "admin":"admin" -H "Content-type: application/json" -X GET http://localhost:8181/restconf/operational/vtn:vtns/
{"vtns":{"vtn":[{"name":"vtn_one","vtenant-config":

,"vbridge":[{"name":"vbr_two","vbridge-config":

,"bridge-status":

,"vinterface":[{"name":"if1","vinterface-status":

,"port-map-config":

,"vinterface-config":

,"vinterface-input-filter":{"vtn-flow-filter":[{"index":230,"condition":"flowlist1","vtn-flow-action":[{"order":1,"vtn-set-inet-dscp-action":{"dscp":55}},{"order":2,"vtn-set-vlan-pcp-action":{"vlan-pcp":3}}],"vtn-drop-filter":{}},{"index":233,"condition":"flowlist1","vtn-flow-action":[{"order":1,"vtn-set-inet-dscp-action":{"dscp":55}},{"order":2,"vtn-set-vlan-pcp-action":{"vlan-pcp":3}}],"vtn-drop-filter":{}},{"index":231,"condition":"flowlist1","vtn-flow-action":[{"order":1,"vtn-set-inet-dscp-action":{"dscp":55}},{"order":2,"vtn-set-vlan-pcp-action":{"vlan-pcp":3}}],"vtn-drop-filter":{}}]}},{"name":"if2","vinterface-status":

,"port-map-config":

,"vinterface-config":{"description":"if_desc1","enabled":true}}]}]}]}}[root@uncrhel64 data]#

The flowfilter for Interface if2 with sequence number 233 is not deleted in the vtn manager.