null exception with vpnmanager.subnetmapupdate / network is null

2017-10-26 18:02:08,956 | ERROR | eChangeHandler-7 | AsyncDataTreeChangeListenerBase | 248 - org.opendaylight.genius.mdsalutil-api - 0.4.0.SNAPSHOT | Thread terminated due to uncaught exception: AsyncDataTreeChangeListenerBase-DataTreeChangeHandler-7
 java.lang.NullPointerException
 at org.opendaylight.netvirt.vpnmanager.SubnetmapChangeListener.update(SubnetmapChangeListener.java:108)[344:org.opendaylight.netvirt.vpnmanager-impl:0.6.0.SNAPSHOT]
 at org.opendaylight.netvirt.vpnmanager.SubnetmapChangeListener.update(SubnetmapChangeListener.java:29)[344:org.opendaylight.netvirt.vpnmanager-impl:0.6.0.SNAPSHOT]
 at org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase$DataTreeChangeHandler.run(AsyncDataTreeChangeListenerBase.java:142)[248:org.opendaylight.genius.mdsalutil-api:0.4.0.SNAPSHOT]
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[:1.8.0_144]
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[:1.8.0_144]
 at java.lang.Thread.run(Thread.java:748)[:1.8.0_144]
 2017-10-26 18:02:08,957 | INFO | n-dispatcher-104 | FlowBasedServicesConfigListener | 242 - org.opendaylight.genius.interfacemanager-impl - 0.4.0.SNAPSHOT | Service Binding Entry removed for Interface: ea668702-1555-4d90-a345-7408c992d152, Data: BoundServices{getServiceName=vpn.037b1aa1-2535-48b7-afdd-e3d92c88f1fe.ea668702-1555-4d90-a345-7408c992d152, getServicePriority=8, getServiceType=class org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceTypeFlowBased, augmentations={interface org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.StypeOpenflow=StypeOpenflow{getFlowCookie=134217729, getFlowPriority=10, getInstruction=[Instruction{getInstruction=GoToTableCase{getGoToTable=GoToTable{getTableId=19, augmentations={}}, augmentations={}}, getOrder=3, augmentations={}}, Instruction{getInstruction=WriteMetadataCase{getWriteMetadata=WriteMetadata{getMetadata=200018, getMetadataMask=16777214, augmentations={}}, augmentations={}}, getOrder=2, augmentations={}}, Instruction{getInstruction=ApplyActionsCase{getApplyActions=ApplyActions{getAction=[Action{getAction=ServiceBindingNxActionRegLoadApplyActionsCase{getNxRegLoad=NxRegLoad{getDst=Dst{getDstChoice=DstNxRegCase{getNxReg=class org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg3, augmentations={}}, getEnd=24, getStart=0, augmentations={}}, getValue=100009, augmentations={}}, augmentations={}}, getOrder=0, augmentations={}}], augmentations={}}, augmentations={}}, getOrder=1, augmentations={}}]}}}
seen on https://logs.opendaylight.org/releng/jenkins092/netvirt-csit-1node-openstack-ocata-gate-stateful-oxygen/183/odl1_karaf.log.gz