NullPointerException on handleInterfaceUpdate for br-ex

Version: stable/boron

Synoptic: Not sure what triggers the issue, I was defining some VMs and SGs, suddenly all existing flows wereremoved from OVS and replaced with brand-new pipeline flow entries.

The karaf log shows NullPointerException as below, notice the strange node URI in the log

Uri [_value=ovsdb://uuid/85dddd00-5125-4aa1-835f-fa332b2ca7d1/bridge/br-ex/bridge/br-int

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

2017-03-01 12:08:12,966 | WARN | ntDispatcherImpl | OF13Provider | 319 - org.opendaylight.netvirt.openstack.net-virt-providers - 1.3.3.SNAPSHOT | Trigger Interface update for OvsdbTerminationPointAugmentation{getIfindex=0, getIngressPolicingBurst=0, getIngressPolicingRate=0, getInterfaceExternalIds=[InterfaceExternalIds{getExternalIdKey=iface-id, getExternalIdValue=9bd59c7e-b674-45d2-9f54-767f4ccd1715, augmentations={}}, InterfaceExternalIds{getExternalIdKey=attached-mac, getExternalIdValue=fa:16:3e:46:c4:df, augmentations={}}, InterfaceExternalIds{getExternalIdKey=iface-status, getExternalIdValue=active, augmentations={}}], getInterfaceType=class org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.InterfaceTypeInternal, getInterfaceUuid=Uuid [_value=61de3bda-03ec-414b-a122-591046aa7a75], getName=qg-9bd59c7e-b6, getOfport=1, getPortUuid=Uuid [_value=ae8e9ec9-555e-4fed-b1d9-ac357f4586e0]}
2017-03-01 12:08:12,966 | DEBUG | ntDispatcherImpl | OF13Provider | 319 - org.opendaylight.netvirt.openstack.net-virt-providers - 1.3.3.SNAPSHOT | handleInterfaceUpdate: network: 1080 srcNode: Uri [_value=ovsdb://uuid/85dddd00-5125-4aa1-835f-fa332b2ca7d1/bridge/br-ex], intf: qg-9bd59c7e-b6
2017-03-01 12:08:12,966 | DEBUG | ntDispatcherImpl | MdsalUtils | 315 - org.opendaylight.netvirt.utils.mdsal-utils - 1.3.3.SNAPSHOT | org.opendaylight.netvirt.utils.mdsal.utils.MdsalUtils.read(MdsalUtils.java:124): Failed to read KeyedInstanceIdentifier

{targetType=interface org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node, path=[org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology, org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology[key=TopologyKey [_topologyId=Uri [_value=ovsdb:1]]], org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node[key=NodeKey [_nodeId=Uri [_value=ovsdb://uuid/85dddd00-5125-4aa1-835f-fa332b2ca7d1/bridge/br-ex/bridge/br-int]]]]}

2017-03-01 12:08:12,966 | ERROR | ntDispatcherImpl | NodeCacheManagerImpl | 318 - org.opendaylight.netvirt.openstack.net-virt - 1.3.3.SNAPSHOT | Failed notifying node add event
java.lang.NullPointerException
at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.programLocalRules(OF13Provider.java:744)
at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.handleInterfaceUpdate(OF13Provider.java:1152)
at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.triggerInterfaceUpdates(OF13Provider.java:1224)
at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.initializeOFFlowRules(OF13Provider.java:2011)
at org.opendaylight.netvirt.openstack.netvirt.SouthboundHandler.notifyNode(SouthboundHandler.java:292)[318:org.opendaylight.netvirt.openstack.net-virt:1.3.3.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.NodeCacheManagerImpl.processNodeUpdate(NodeCacheManagerImpl.java:91)[318:org.opendaylight.netvirt.openstack.net-virt:1.3.3.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.NodeCacheManagerImpl.processEvent(NodeCacheManagerImpl.java:130)[318:org.opendaylight.netvirt.openstack.net-virt:1.3.3.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.EventDispatcherImpl.dispatchEvent(EventDispatcherImpl.java:96)[318:org.opendaylight.netvirt.openstack.net-virt:1.3.3.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.EventDispatcherImpl.lambda$start$0(EventDispatcherImpl.java:58)[318:org.opendaylight.netvirt.openstack.net-virt:1.3.3.SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_101]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_101]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_101]