2018-05-26T04:52:21,854 | WARN  | opendaylight-cluster-data-shard-dispatcher-22 | ShardDataTree                    | 246 - org.opendaylight.controller.sal-distributed-datastore - 1.8.0.SNAPSHOT | member-1-shard-default-operational: Store Tx member-1-datastore-operational-fe-0-txn-16206-0: Conflicting modification for path /(urn:opendaylight:netvirt:elan?revision=2015-06-02)elan-dpn-interfaces/elan-dpn-interfaces-list/elan-dpn-interfaces-list[{(urn:opendaylight:netvirt:elan?revision=2015-06-02)elan-instance-name=f8feff3a-810a-4b52-881c-281fb9c18fc2}].
2018-05-26T04:52:21,855 | ERROR | opendaylight-cluster-data-akka.actor.default-dispatcher-55 | LocalThreePhaseCommitCohort      | 246 - org.opendaylight.controller.sal-distributed-datastore - 1.8.0.SNAPSHOT | Failed to prepare transaction member-1-datastore-operational-fe-0-txn-16206-0 on backend
org.opendaylight.mdsal.common.api.OptimisticLockFailedException: Optimistic lock failed for path /(urn:opendaylight:netvirt:elan?revision=2015-06-02)elan-dpn-interfaces/elan-dpn-interfaces-list/elan-dpn-interfaces-list[{(urn:opendaylight:netvirt:elan?revision=2015-06-02)elan-instance-name=f8feff3a-810a-4b52-881c-281fb9c18fc2}]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:740) ~[246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPending(ShardDataTree.java:778) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPendingTransaction(ShardDataTree.java:725) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.startCanCommit(ShardDataTree.java:808) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.SimpleShardDataTreeCohort.canCommit(SimpleShardDataTreeCohort.java:84) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.CohortEntry.canCommit(CohortEntry.java:97) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleCanCommit(ShardCommitCoordinator.java:236) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleReadyLocalTransaction(ShardCommitCoordinator.java:200) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.Shard.handleReadyLocalTransaction(Shard.java:731) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:333) [246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270) [230:org.opendaylight.controller.sal-akka-raft:1.8.0.SNAPSHOT]
	at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44) [238:org.opendaylight.controller.sal-clustering-commons:1.8.0.SNAPSHOT]
	at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:275) [43:com.typesafe.akka.persistence:2.5.11]
	at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:104) [238:org.opendaylight.controller.sal-clustering-commons:1.8.0.SNAPSHOT]
	at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:608) [40:com.typesafe.akka.actor:2.5.11]
	at akka.actor.Actor.aroundReceive(Actor.scala:517) [40:com.typesafe.akka.actor:2.5.11]
	at akka.actor.Actor.aroundReceive$(Actor.scala:515) [40:com.typesafe.akka.actor:2.5.11]
	at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(PersistentActor.scala:273) [43:com.typesafe.akka.persistence:2.5.11]
	at akka.persistence.Eventsourced$$anon$1.stateReceive(Eventsourced.scala:691) [43:com.typesafe.akka.persistence:2.5.11]
	at akka.persistence.Eventsourced.aroundReceive(Eventsourced.scala:192) [43:com.typesafe.akka.persistence:2.5.11]
	at akka.persistence.Eventsourced.aroundReceive$(Eventsourced.scala:191) [43:com.typesafe.akka.persistence:2.5.11]
	at akka.persistence.UntypedPersistentActor.aroundReceive(PersistentActor.scala:273) [43:com.typesafe.akka.persistence:2.5.11]
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:590) [40:com.typesafe.akka.actor:2.5.11]
	at akka.actor.ActorCell.invoke(ActorCell.scala:559) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.Mailbox.run(Mailbox.scala:224) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [40:com.typesafe.akka.actor:2.5.11]
	at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [40:com.typesafe.akka.actor:2.5.11]
Caused by: org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was deleted by other transaction.
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:287) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.StructuralContainerModificationStrategy.checkApplicable(StructuralContainerModificationStrategy.java:101) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:72) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractDataTreeTip.validate(AbstractDataTreeTip.java:35) ~[444:org.opendaylight.yangtools.yang-data-impl:2.0.3]
	at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:732) ~[246:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
	... 30 more