NPE at org.opendaylight.netvirt.vpnmanager.VpnSubnetRouteHandler.onSubnetAddedToVpn

2017-04-03 03:03:49,131 | ERROR | eChangeHandler-1 | AsyncDataTreeChangeListenerBase | 298 - org.opendaylight.genius.mdsalutil-api - 0.2.0.SNAPSHOT | Thread terminated due to uncaught exception: AsyncDataTreeChangeListenerBase-DataTreeChangeHandler-1
java.lang.NullPointerException
at org.opendaylight.netvirt.vpnmanager.VpnSubnetRouteHandler.onSubnetAddedToVpn(VpnSubnetRouteHandler.java:77)[339:org.opendaylight.netvirt.vpnmanager-impl:0.4.0.SNAPSHOT]
at org.opendaylight.netvirt.vpnmanager.VpnManagerImpl.onSubnetAddedToVpn(VpnManagerImpl.java:319)[339:org.opendaylight.netvirt.vpnmanager-impl:0.4.0.SNAPSHOT]
at Proxy7f814492_9378_413a_9946_10353438495d.onSubnetAddedToVpn(Unknown Source)[:]
at Proxy4fd538af_51f1_4904_b650_cc969d55439b.onSubnetAddedToVpn(Unknown Source)[:]
at org.opendaylight.netvirt.natservice.internal.ExternalSubnetVpnInstanceListener.invokeSubnetAddedToVpn(ExternalSubnetVpnInstanceListener.java:100)[348:org.opendaylight.netvirt.natservice-impl:0.4.0.SNAPSHOT]
at org.opendaylight.netvirt.natservice.internal.ExternalSubnetVpnInstanceListener.add(ExternalSubnetVpnInstanceListener.java:87)[348:org.opendaylight.netvirt.natservice-impl:0.4.0.SNAPSHOT]
at org.opendaylight.netvirt.natservice.internal.ExternalSubnetVpnInstanceListener.add(ExternalSubnetVpnInstanceListener.java:28)[348:org.opendaylight.netvirt.natservice-impl:0.4.0.SNAPSHOT]
at org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase$DataTreeChangeHandler.run(AsyncDataTreeChangeListenerBase.java:155)[298:org.opendaylight.genius.mdsalutil-api:0.2.0.SNAPSHOT]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_121]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]