我们最近移到了Nitrogen-SR3，并且我们已经定制了具有2个节点的集群。当我们重新启动节点时（即，在故障回复之后），我们在karaf.log中观察到以下异常，并且该节点无法加入集群。我们非常感谢您的帮助。
java.util.concurrent.TimeoutException: Connection attempt failed
at org.opendaylight.controller.cluster.databroker.actors.dds.AbstractShardBackendResolver.wrap(AbstractShardBackendResolver.java:129)[505:org.opendaylight.controller.sal-distributed-datastore:1.6.3]
at org.opendaylight.controller.cluster.databroker.actors.dds.AbstractShardBackendResolver.lambda$connectShard$2(AbstractShardBackendResolver.java:142)[505:org.opendaylight.controller.sal-distributed-datastore:1.6.3]
at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)[:1.8.0_66]
at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)[:1.8.0_66]
at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)[:1.8.0_66]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)[:1.8.0_66]
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)[:1.8.0_66]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)[:1.8.0_66]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)[:1.8.0_66]
Caused by: org.opendaylight.controller.cluster.access.concepts.RetiredGenerationException: Originating generation was superseded by 3
at org.opendaylight.controller.cluster.datastore.Shard.findFrontend(Shard.java:482)[505:org.opendaylight.controller.sal-distributed-datastore:1.6.3]
at org.opendaylight.controller.cluster.datastore.Shard.handleConnectClient(Shard.java:522)[505:org.opendaylight.controller.sal-distributed-datastore:1.6.3]
at org.opendaylight.controller.cluster.datastore.Shard.handleNonRaftCommand(Shard.java:325)[505:org.opendaylight.controller.sal-distributed-datastore:1.6.3]
at org.opendaylight.controller.cluster.raft.RaftActor.handleCommand(RaftActor.java:270)[490:org.opendaylight.controller.sal-akka-raft:1.6.3]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveCommand(AbstractUntypedPersistentActor.java:44)[498:org.opendaylight.controller.sal-clustering-commons:1.6.3]
at akka.persistence.UntypedPersistentActor.onReceive(PersistentActor.scala:170)[321:com.typesafe.akka.persistence:2.4.20]