ModifiedNodeDoesNotExistException

The log report the warning  frequently:

ember-1-shard-inventory-operational: Store Tx member-1-datastore-operational-fe-1-chn-6-txn-1364421-0: Data validation failed for path /(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[\{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:8816868232900}]/node-connector/node-connector[\{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:8816868232900:2}].
org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException: Node /(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[\{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:8816868232900}]/node-connector/node-connector[\{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:8816868232900:2}] does not exist. Cannot apply modification to its children.
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:282) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]

at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.StructuralContainerModificationStrategy.checkApplicable(StructuralContainerModificationStrategy.java:100) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:304) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:286) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:71) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractDataTreeTip.validate(AbstractDataTreeTip.java:38) ~[433:org.opendaylight.yangtools.yang-data-impl:2.0.6.1]
at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:741) ~[229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPending(ShardDataTree.java:787) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPendingTransaction(ShardDataTree.java:734) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.ShardDataTree.startCanCommit(ShardDataTree.java:888) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]

at org.opendaylight.controller.cluster.datastore.SimpleShardDataTreeCohort.canCommit(SimpleShardDataTreeCohort.java:99) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.CohortEntry.canCommit(CohortEntry.java:99) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleCanCommit(ShardCommitCoordinator.java:239) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleReadyLocalTransaction(ShardCommitCoordinator.java:201) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.Shard.handleReadyLocalTransaction(Shard.java:739) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:336) [229:org.opendaylight.controller.sal-distributed-datastore:1.7.3]
at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270) [214:org.opendaylight.controller.sal-akka-raft:1.7.3]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44) [222:org.opendaylight.controller.sal-clustering-commons:1.7.3]
at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:275) [87:com.typesafe.akka.persistence:2.5.11]
at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:104) [222:org.opendaylight.controller.sal-clustering-commons:1.7.3]
at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:608) [84:com.typesafe.akka.actor:2.5.11]
at akka.actor.Actor.aroundReceive(Actor.scala:517) [84:com.typesafe.akka.actor:2.5.11]
at akka.actor.Actor.aroundReceive$(Actor.scala:515) [84:com.typesafe.akka.actor:2.5.11]
at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(PersistentActor.scala:273) [87:com.typesafe.akka.persistence:2.5.11]
at akka.persistence.Eventsourced$$anon$1.stateReceive(Eventsourced.scala:691) [87:com.typesafe.akka.persistence:2.5.11]
at akka.persistence.Eventsourced.aroundReceive(Eventsourced.scala:192) [87:com.typesafe.akka.persistence:2.5.11]
at akka.persistence.Eventsourced.aroundReceive$(Eventsourced.scala:191) [87:com.typesafe.akka.persistence:2.5.11]
at akka.persistence.UntypedPersistentActor.aroundReceive(PersistentActor.scala:273) [87:com.typesafe.akka.persistence:2.5.11]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:590) [84:com.typesafe.akka.actor:2.5.11]
at akka.actor.ActorCell.invoke(ActorCell.scala:559) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.Mailbox.run(Mailbox.scala:224) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.Mailbox.exec(Mailbox.scala:234) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [84:com.typesafe.akka.actor:2.5.11]
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [84:com.typesafe.akka.actor:2.5.11]