ReadFailedException

{message=Error reading data for path /(urn:ipsdn:framework:tunnel:data?revision=2015-09-01)node-tunnels-data, errorList=[RpcError [message=Error reading data for path /(urn:ipsdn:framework:tunnel:data?revision=2015-09-01)node-tunnels-data, severity=ERROR, errorType=APPLICATION, tag=operation-failed, applicationTag=null, info=null, cause=java.lang.Exception: Error creating READ_ONLY transaction on shard default]]}

at org.opendaylight.controller.cluster.datastore.NoOpTransactionContext.readData(NoOpTransactionContext.java:80)
at org.opendaylight.controller.cluster.datastore.TransactionProxy$2.invoke(TransactionProxy.java:112)
at org.opendaylight.controller.cluster.datastore.TransactionContextWrapper.executePriorTransactionOperations(TransactionContextWrapper.java:132)
at org.opendaylight.controller.cluster.datastore.RemoteTransactionContextSupport.createTransactionContext(RemoteTransactionContextSupport.java:237)
at org.opendaylight.controller.cluster.datastore.RemoteTransactionContextSupport.onCreateTransactionComplete(RemoteTransactionContextSupport.java:200)
at org.opendaylight.controller.cluster.datastore.RemoteTransactionContextSupport.access$000(RemoteTransactionContextSupport.java:40)
at org.opendaylight.controller.cluster.datastore.RemoteTransactionContextSupport$1.onComplete(RemoteTransactionContextSupport.java:135)
at akka.dispatch.OnComplete.internal(Future.scala:247)
at akka.dispatch.OnComplete.internal(Future.scala:245)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:175)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:172)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:90)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:88)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:88)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:88)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.Exception: Error creating READ_ONLY transaction on shard default
at org.opendaylight.controller.cluster.datastore.RemoteTransactionContextSupport.createTransactionContext(RemoteTransactionContextSupport.java:222)
... 20 more
Caused by: akka.actor.InvalidActorNameException: actor name [shard-member-1-txn-83] is not unique!
at akka.actor.dungeon.ChildrenContainer$NormalChildrenContainer.reserve(ChildrenContainer.scala:130)
at akka.actor.dungeon.Children$class.reserveChild(Children.scala:76)
at akka.actor.ActorCell.reserveChild(ActorCell.scala:369)
at akka.actor.dungeon.Children$class.makeChild(Children.scala:201)
at akka.actor.dungeon.Children$class.actorOf(Children.scala:37)
at akka.actor.ActorCell.actorOf(ActorCell.scala:369)
at org.opendaylight.controller.cluster.datastore.ShardTransactionActorFactory.newShardTransaction(ShardTransactionFactory.java:55)
at org.opendaylight.controller.cluster.datastore.Shard.createTypedTransactionActor(Shard.java:521)
at org.opendaylight.controller.cluster.datastore.Shard.createTransaction(Shard.java:553)
at org.opendaylight.controller.cluster.datastore.Shard.createTransaction(Shard.java:532)
at org.opendaylight.controller.cluster.datastore.Shard.handleCreateTransaction(Shard.java:504)
at org.opendaylight.controller.cluster.datastore.Shard.onReceiveCommand(Shard.java:224)
at akka.persistence.UntypedPersistentActor.onReceive(Eventsourced.scala:430)
at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:97)
at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:534)
at akka.persistence.Recovery$State$class.process(Recovery.scala:30)
at akka.persistence.ProcessorImpl$$anon$2.process(Processor.scala:103)
at akka.persistence.ProcessorImpl$$anon$2.aroundReceive(Processor.scala:114)
at akka.persistence.Recovery$class.aroundReceive(Recovery.scala:265)
at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(Eventsourced.scala:428)
at akka.persistence.Eventsourced$$anon$2.doAroundReceive(Eventsourced.scala:82)
at akka.persistence.Eventsourced$$anon$2.aroundReceive(Eventsourced.scala:78)
at akka.persistence.Eventsourced$class.aroundReceive(Eventsourced.scala:369)
at akka.persistence.UntypedPersistentActor.aroundReceive(Eventsourced.scala:428)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)
at akka.dispatch.Mailbox.run(Mailbox.scala:221)
at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
... 4 more

I check the code ,find that:the actor name maybe conflict betwen config and operational datastore,they may generate the same actor name on the same time,such as "shard-member-1-txn-83".