Using Port configuration for Peer Group under XML config file at the first run of KARAF will end on Cast Exception, when receiving onDataTreeChanged notification.

On the other side if the configuration is used once karaf is already running, no cast exception will be trowed.

Line causing the exception is the getAugmantation

 
if (config != null) {
    final NeighborTransportConfig peerTc = config.getAugmentation(NeighborTransportConfig.class);   <----Line 156
    ....
    ....

2018-03-22 08:38:33,898 | ERROR | on-dispatcher-45 | DataTreeChangeListenerActor | 250 - org.opendaylight.controller.sal-clustering-commons - 1.8.0.SNAPSHOT | member-1-shard-default-config: Error notifying listener org.opendaylight.controller.cluster.databroker.compat.LegacyDOMDataBrokerAdapter$2$$Lambda$1065/1620722541@7125d1ae
java.lang.ClassCastException: com.sun.proxy.$Proxy241 cannot be cast to org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.openconfig.extensions.rev180321.NeighborTransportConfig
at org.opendaylight.protocol.bgp.rib.impl.config.OpenConfigMappingUtil.getPort(OpenConfigMappingUtil.java:156) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.OpenConfigMappingUtil.getPort(OpenConfigMappingUtil.java:387) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer$BgpPeerSingletonService.<init>(BgpPeer.java:271) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer$BgpPeerSingletonService.<init>(BgpPeer.java:216) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer.start(BgpPeer.java:136) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService.initiatePeerInstance(BGPClusterSingletonService.java:332) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService.onNeighborCreated(BGPClusterSingletonService.java:259) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService.onNeighborModified(BGPClusterSingletonService.java:242) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BGPClusterSingletonService.onNeighborsChanged(BGPClusterSingletonService.java:230) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BgpDeployerImpl.onNeighborsChanged(BgpDeployerImpl.java:208) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.config.BgpDeployerImpl.onDataTreeChanged(BgpDeployerImpl.java:138) ~[212:org.opendaylight.bgpcep.bgp-rib-impl:0.10.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMDataTreeChangeListenerAdapter.onDataTreeChanged(BindingDOMDataTreeChangeListenerAdapter.java:42) ~[244:org.opendaylight.controller.sal-binding-broker-impl:1.8.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.compat.LegacyDOMDataBrokerAdapter$2.lambda$registerDataTreeChangeListener$0(LegacyDOMDataBrokerAdapter.java:105) ~[257:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.dataChanged(DataTreeChangeListenerActor.java:67) [257:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.handleReceive(DataTreeChangeListenerActor.java:41) [257:org.opendaylight.controller.sal-distributed-datastore:1.8.0.SNAPSHOT]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:38) [250:org.opendaylight.controller.sal-clustering-commons:1.8.0.SNAPSHOT]
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:166) [82:com.typesafe.akka.actor:2.5.4]
at akka.actor.Actor.aroundReceive(Actor.scala:514) [82:com.typesafe.akka.actor:2.5.4]
at akka.actor.Actor.aroundReceive$(Actor.scala:512) [82:com.typesafe.akka.actor:2.5.4]
at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:96) [82:com.typesafe.akka.actor:2.5.4]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:527) [82:com.typesafe.akka.actor:2.5.4]
at akka.actor.ActorCell.invoke(ActorCell.scala:496) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.Mailbox.run(Mailbox.scala:224) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.Mailbox.exec(Mailbox.scala:234) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [82:com.typesafe.akka.actor:2.5.4]
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [82:com.typesafe.akka.actor:2.5.4]