null pointer exception in NeutronSubnetChangeListener.java

> 2015-12-03 10:18:45,889 | TRACE | lt-dispatcher-32 | NeutronSubnetChangeListener | 267 - org.opendaylight.ovsdb.openstack.net-virt - 1.2.1.SNAPSHOT | Data changes : Translated
> DataChangeEvent{created={KeyedInstanceIdentifier

=Subnet{getAllocationPools=[AllocationPools{getEnd=10.100.0.14, getStart=10.100.0.1, augmentations={}}], getCidr=10.100.0.0/28, getDnsNameservers=[], getIpVersion=class org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4, getName=, getNetworkId=Uuid [_value=17ce32b1-455e-4c2f-8819-b5a1374637ed], getTenantId=Uuid [_value=dee4a5dd-9482-4cf5-9c26-fc492cef01a2], getUuid=Uuid [_value=0c103011-92f2-4e88-985a-10dd56b67a95], isEnableDhcp=true, augmentations={}}}, updated={}, removed=[], dom=DOMImmutableDataChangeEvent [created=[/(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/ip-version, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/enable-dhcp, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/network-id, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

], /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/allocation-pools, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/tenant-id, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/uuid, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/name, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/dns-nameservers, /(urn:opendaylight:neutron?revision=2015-07-12)neutron/subnets/subnet/subnet[

]/cidr], updated=[], removed=[]]}
> 2015-12-03 10:18:45,889 | ERROR | lt-dispatcher-32 | DataChangeListener | 140 - org.opendaylight.controller.sal-distributed-datastore - 1.3.0.SNAPSHOT | Error notifying listener org.opendaylight.ovsdb.openstack.netvirt.translator.iaware.impl.NeutronSubnetChangeListener
> java.lang.NullPointerException
> at org.opendaylight.ovsdb.openstack.netvirt.translator.iaware.impl.NeutronSubnetChangeListener.fromMd(NeutronSubnetChangeListener.java:145)[267:org.opendaylight.ovsdb.openstack.net-virt:1.2.1.SNAPSHOT]
> at org.opendaylight.ovsdb.openstack.netvirt.translator.iaware.impl.NeutronSubnetChangeListener.createSubnet(NeutronSubnetChangeListener.java:97)[267:org.opendaylight.ovsdb.openstack.net-virt:1.2.1.SNAPSHOT]
> at org.opendaylight.ovsdb.openstack.netvirt.translator.iaware.impl.NeutronSubnetChangeListener.onDataChanged(NeutronSubnetChangeListener.java:87)[267:org.opendaylight.ovsdb.openstack.net-virt:1.2.1.SNAPSHOT]
> at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker$TranslatingDataChangeInvoker.onDataChanged(AbstractForwardedDataBroker.java:143)[115:org.opendaylight.controller.sal-binding-broker-impl:1.3.0.SNAPSHOT]
> at org.opendaylight.controller.cluster.datastore.DataChangeListener.dataChanged(DataChangeListener.java:66)[140:org.opendaylight.controller.sal-distributed-datastore:1.3.0.SNAPSHOT]
> at org.opendaylight.controller.cluster.datastore.DataChangeListener.handleReceive(DataChangeListener.java:39)[140:org.opendaylight.controller.sal-distributed-datastore:1.3.0.SNAPSHOT]
> at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:34)[136:org.opendaylight.controller.sal-clustering-commons:1.3.0.SNAPSHOT]
> at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)[125:com.typesafe.akka.actor:2.3.14]
> at akka.actor.Actor$class.aroundReceive(Actor.scala:467)[125:com.typesafe.akka.actor:2.3.14]
> at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)[125:com.typesafe.akka.actor:2.3.14]
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)[125:com.typesafe.akka.actor:2.3.14]
> at akka.actor.ActorCell.invoke(ActorCell.scala:487)[125:com.typesafe.akka.actor:2.3.14]
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)[125:com.typesafe.akka.actor:2.3.14]
> at akka.dispatch.Mailbox.run(Mailbox.scala:220)[125:com.typesafe.akka.actor:2.3.14]
> at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)[125:com.typesafe.akka.actor:2.3.14]
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[122:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
> at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[122:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[122:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
> at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[122:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]