ElanUtils.waitForTransactionToComplete should not LOG.error for OptimisticLockFailedException

2018-04-13T23:40:08,068 | ERROR | ForkJoinPool-1-worker-27 | ElanUtils                        | 351 - org.opendaylight.netvirt.elanmanager-impl - 0.6.0.redhat-5 | Error writing to datastore {}
java.util.concurrent.ExecutionException: 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 deleted by other transaction.]]}
        at org.opendaylight.mdsal.common.api.MappingCheckedFuture.wrapInExecutionException(MappingCheckedFuture.java:66) [296:org.opendaylight.mdsal.common-api:2.4.0.redhat-5]
        at org.opendaylight.mdsal.common.api.MappingCheckedFuture.get(MappingCheckedFuture.java:79) [296:org.opendaylight.mdsal.common-api:2.4.0.redhat-5]
        at org.opendaylight.netvirt.elan.utils.ElanUtils.waitForTransactionToComplete(ElanUtils.java:1381) [351:org.opendaylight.netvirt.elanmanager-impl:0.6.0.redhat-5]
        at org.opendaylight.netvirt.elan.internal.ElanInterfaceManager.removeElanInterface(ElanInterfaceManager.java:275) [351:org.opendaylight.netvirt.elanmanager-impl:0.6.0.redhat-5]
        at org.opendaylight.netvirt.elan.internal.InterfaceRemoveWorkerOnElan.call(InterfaceRemoveWorkerOnElan.java:52) [351:org.opendaylight.netvirt.elanmanager-impl:0.6.0.redhat-5]
        at org.opendaylight.netvirt.elan.internal.InterfaceRemoveWorkerOnElan.call(InterfaceRemoveWorkerOnElan.java:21) [351:org.opendaylight.netvirt.elanmanager-impl:0.6.0.redhat-5]
        at org.opendaylight.infrautils.jobcoordinator.internal.JobCoordinatorImpl$MainTask.runWithUncheckedExceptionLogging(JobCoordinatorImpl.java:416) [281:org.opendaylight.infrautils.jobcoordinator-impl:1.3.0.redhat-5]
        at org.opendaylight.infrautils.utils.concurrent.LoggingUncaughtThreadDeathContextRunnable.run(LoggingUncaughtThreadDeathContextRunnable.java:60) [287:org.opendaylight.infrautils.util:1.3.0.redhat-5]
        at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) [?:?]
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) [?:?]
        at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) [?:?]
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) [?:?]
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) [?:?]
Caused by: org.opendaylight.controller.md.sal.common.api.data.OptimisticLockFailedException: Optimistic lock failed.
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:740) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPending(ShardDataTree.java:778) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPendingTransaction(ShardDataTree.java:725) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.startCanCommit(ShardDataTree.java:808) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.SimpleShardDataTreeCohort.canCommit(SimpleShardDataTreeCohort.java:84) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.CohortEntry.canCommit(CohortEntry.java:97) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleCanCommit(ShardCommitCoordinator.java:236) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleReadyLocalTransaction(ShardCommitCoordinator.java:200) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.Shard.handleReadyLocalTransaction(Shard.java:731) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:333) ~[?:?]
        at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270) ~[?:?]
        at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44) ~[?:?]
        at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:274) ~[?:?]
        at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:104) ~[?:?]
        at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:545) ~[?:?]
        at akka.actor.Actor.aroundReceive(Actor.scala:514) ~[?:?]
        at akka.actor.Actor.aroundReceive$(Actor.scala:512) ~[?:?]
 at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(PersistentActor.scala:272) ~[?:?]
        at akka.persistence.Eventsourced$$anon$1.stateReceive(Eventsourced.scala:663) ~[?:?]
        at akka.persistence.Eventsourced.aroundReceive(Eventsourced.scala:183) ~[?:?]
        at akka.persistence.Eventsourced.aroundReceive$(Eventsourced.scala:182) ~[?:?]
        at akka.persistence.UntypedPersistentActor.aroundReceive(PersistentActor.scala:272) ~[?:?]
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:527) ~[?:?]
        at akka.actor.ActorCell.invoke(ActorCell.scala:496) ~[?:?]
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) ~[?:?]
        at akka.dispatch.Mailbox.run(Mailbox.scala:224) ~[?:?]
        at akka.dispatch.Mailbox.exec(Mailbox.scala:234) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) ~[?:?]
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) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.StructuralContainerModificationStrategy.checkApplicable(StructuralContainerModificationStrategy.java:101) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkChildPreconditions(AbstractNodeContainerModificationStrategy.java:307) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:290) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:132) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:72) ~[?:?]
        at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractDataTreeTip.validate(AbstractDataTreeTip.java:35) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.lambda$processNextPendingTransaction$0(ShardDataTree.java:732) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPending(ShardDataTree.java:778) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.processNextPendingTransaction(ShardDataTree.java:725) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardDataTree.startCanCommit(ShardDataTree.java:808) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.SimpleShardDataTreeCohort.canCommit(SimpleShardDataTreeCohort.java:84) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.CohortEntry.canCommit(CohortEntry.java:97) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleCanCommit(ShardCommitCoordinator.java:236) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleReadyLocalTransaction(ShardCommitCoordinator.java:200) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.Shard.handleReadyLocalTransaction(Shard.java:731) ~[?:?]
        at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:333) ~[?:?]
        at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270) ~[?:?]
        at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44) ~[?:?]
        at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:274) ~[?:?]
        at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:104) ~[?:?]
        at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:545) ~[?:?]
        at akka.actor.Actor.aroundReceive(Actor.scala:514) ~[?:?]
        at akka.actor.Actor.aroundReceive$(Actor.scala:512) ~[?:?]
        at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(PersistentActor.scala:272) ~[?:?]
        at akka.persistence.Eventsourced$$anon$1.stateReceive(Eventsourced.scala:663) ~[?:?]
        at akka.persistence.Eventsourced.aroundReceive(Eventsourced.scala:183) ~[?:?]
        at akka.persistence.Eventsourced.aroundReceive$(Eventsourced.scala:182) ~[?:?]
        at akka.persistence.UntypedPersistentActor.aroundReceive(PersistentActor.scala:272) ~[?:?]
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:527) ~[?:?]
        at akka.actor.ActorCell.invoke(ActorCell.scala:496) ~[?:?]
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) ~[?:?]
        at akka.dispatch.Mailbox.run(Mailbox.scala:224) ~[?:?]
        at akka.dispatch.Mailbox.exec(Mailbox.scala:234) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) ~[?:?]
        at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) ~[?:?]