DOMNotificationRouterEvent | Delivery of notification

2016-12-11 09:36:33,523 | ERROR | pool-27-thread-1 | DOMNotificationRouterEvent | 176 - org.opendaylight.controller.sal-broker-impl - 1.4.2.SNAPSHOT | Delivery of notification org.opendaylight.controller.md.sal.binding.impl.LazySerializedDOMNotification@5c2235b caused an error in listener org.opendaylight.controller.md.sal.binding.impl.BindingDOMNotificationListenerAdapter@2b406d9d
java.lang.NullPointerException
at org.opendaylight.netvirt.vpnmanager.ArpNotificationHandler.getFloatingInternalInterface(ArpNotificationHandler.java:414)[360:org.opendaylight.netvirt.vpnmanager-impl:0.3.2.SNAPSHOT]
at org.opendaylight.netvirt.vpnmanager.ArpNotificationHandler.handleArpRequestFromExternalInterface(ArpNotificationHandler.java:299)[360:org.opendaylight.netvirt.vpnmanager-impl:0.3.2.SNAPSHOT]
at org.opendaylight.netvirt.vpnmanager.ArpNotificationHandler.onArpRequestReceived(ArpNotificationHandler.java:169)[360:org.opendaylight.netvirt.vpnmanager-impl:0.3.2.SNAPSHOT]
at org.opendaylight.yangtools.yang.binding.util.NotificationListenerInvoker.invokeNotification(NotificationListenerInvoker.java:91)[82:org.opendaylight.mdsal.yang-binding:0.9.2.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMNotificationListenerAdapter.onNotification(BindingDOMNotificationListenerAdapter.java:44)[178:org.opendaylight.controller.sal-binding-broker-impl:1.4.2.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMNotificationRouterEvent.deliverNotification(DOMNotificationRouterEvent.java:56)[176:org.opendaylight.controller.sal-broker-impl:1.4.2.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMNotificationRouter$1.onEvent(DOMNotificationRouter.java:68)[176:org.opendaylight.controller.sal-broker-impl:1.4.2.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMNotificationRouter$1.onEvent(DOMNotificationRouter.java:65)[176:org.opendaylight.controller.sal-broker-impl:1.4.2.SNAPSHOT]
at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:129)[163:com.lmax.disruptor:3.3.4]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_111]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_111]