2017-11-13 07:40:20,655 | ERROR | eChangeHandler-0 | AsyncDataTreeChangeListenerBase  | 292 - org.opendaylight.genius.mdsalutil-api - 0.2.3.SNAPSHOT | Thread terminated due to uncaught exception: AsyncDataTreeChangeListenerBase-DataTreeChangeHandler-0
java.lang.RuntimeException: OptimisticLockFailedException{message=Optimistic lock failed., errorList=[RpcError [message=Optimistic lock failed., severity=ERROR, errorType=APPLICATION, tag=resource-denied, applicationTag=null, info=null, cause=org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was created by other transaction.]]}
	at org.opendaylight.genius.mdsalutil.MDSALUtil.syncWrite(MDSALUtil.java:586)[292:org.opendaylight.genius.mdsalutil-api:0.2.3.SNAPSHOT]
	at org.opendaylight.netvirt.natservice.internal.NAPTSwitchSelector.selectNewNAPTSwitch(NAPTSwitchSelector.java:78)[342:org.opendaylight.netvirt.natservice-impl:0.4.3.SNAPSHOT]
	at org.opendaylight.netvirt.natservice.internal.ExternalRoutersListener.getPrimaryNaptSwitch(ExternalRoutersListener.java:348)[342:org.opendaylight.netvirt.natservice-impl:0.4.3.SNAPSHOT]
	at org.opendaylight.netvirt.natservice.internal.ExternalRoutersListener.update(ExternalRoutersListener.java:1215)[342:org.opendaylight.netvirt.natservice-impl:0.4.3.SNAPSHOT]
	at org.opendaylight.netvirt.natservice.internal.ExternalRoutersListener.update(ExternalRoutersListener.java:140)[342:org.opendaylight.netvirt.natservice-impl:0.4.3.SNAPSHOT]
	at org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase$DataTreeChangeHandler.run(AsyncDataTreeChangeListenerBase.java:160)[292:org.opendaylight.genius.mdsalutil-api:0.2.3.SNAPSHOT]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[:1.8.0_151]
	at java.lang.Thread.run(Thread.java:748)[:1.8.0_151]
Caused by: OptimisticLockFailedException{message=Optimistic lock failed., errorList=[RpcError [message=Optimistic lock failed., severity=ERROR, errorType=APPLICATION, tag=resource-denied, applicationTag=null, info=null, cause=org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was created by other transaction.]]}
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:751)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPending(ShardDataTree.java:789)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPendingTransaction(ShardDataTree.java:736)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.startCanCommit(ShardDataTree.java:819)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.SimpleShardDataTreeCohort.canCommit(SimpleShardDataTreeCohort.java:90)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.CohortEntry.canCommit(CohortEntry.java:97)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleCanCommit(ShardCommitCoordinator.java:236)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleReadyLocalTransaction(ShardCommitCoordinator.java:200)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.Shard.handleReadyLocalTransaction(Shard.java:675)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:316)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270)[178:org.opendaylight.controller.sal-akka-raft:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44)[177:org.opendaylight.controller.sal-clustering-commons:1.5.3.SNAPSHOT]
	at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:170)[165:com.typesafe.akka.persistence:2.4.18]
	at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:104)[177:org.opendaylight.controller.sal-clustering-commons:1.5.3.SNAPSHOT]
	at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:544)[158:com.typesafe.akka.actor:2.4.18]
	at akka.actor.Actor$class.aroundReceive(Actor.scala:502)[158:com.typesafe.akka.actor:2.4.18]
	at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(PersistentActor.scala:168)[165:com.typesafe.akka.persistence:2.4.18]
	at akka.persistence.Eventsourced$$anon$1.stateReceive(Eventsourced.scala:727)[165:com.typesafe.akka.persistence:2.4.18]
	at akka.persistence.Eventsourced$class.aroundReceive(Eventsourced.scala:183)[165:com.typesafe.akka.persistence:2.4.18]
	at akka.persistence.UntypedPersistentActor.aroundReceive(PersistentActor.scala:168)[165:com.typesafe.akka.persistence:2.4.18]
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)[158:com.typesafe.akka.actor:2.4.18]
	at akka.actor.ActorCell.invoke(ActorCell.scala:495)[158:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)[158:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.run(Mailbox.scala:224)[158:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)[158:com.typesafe.akka.actor:2.4.18]
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[154:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[154:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[154:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[154:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
Caused by: org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was created by other transaction.
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkWriteApplicable(SchemaAwareApplyOperation.java:174)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:128)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:305)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkMergeApplicable(AbstractNodeContainerModificationStrategy.java:313)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:305)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkMergeApplicable(AbstractNodeContainerModificationStrategy.java:313)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.StructuralContainerModificationStrategy.checkApplicable(StructuralContainerModificationStrategy.java:99)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:305)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:288)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:125)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:72)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractDataTreeTip.validate(AbstractDataTreeTip.java:35)[81:org.opendaylight.yangtools.yang-data-impl:1.1.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:743)[184:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	... 28 more