2017-08-04 17:06:30,736 | ERROR | ult-dispatcher-3 | ClusterSingletonServiceGroupImpl | 183 - org.opendaylight.mdsal.singleton-dom-impl - 2.3.0.Nitrogen | Unexpected exception state for service Provider example-bgp-rib-service-group in TakeLeadership
java.lang.NullPointerException
at org.opendaylight.protocol.bgp.rib.impl.RIBImpl.startLocRib(RIBImpl.java:181)[225:org.opendaylight.bgpcep.bgp-rib-impl:0.8.0.Nitrogen]
at java.lang.Iterable.forEach(Iterable.java:75)[:1.8.0_141]
at org.opendaylight.protocol.bgp.rib.impl.RIBImpl.instantiateServiceInstance(RIBImpl.java:353)[225:org.opendaylight.bgpcep.bgp-rib-impl:0.8.0.Nitrogen]
at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceRegistrationDelegator.instantiateServiceInstance(ClusterSingletonServiceRegistrationDelegator.java:47)[183:org.opendaylight.mdsal.singleton-dom-impl:2.3.0.Nitrogen]
at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.takeOwnership(ClusterSingletonServiceGroupImpl.java:305)[183:org.opendaylight.mdsal.singleton-dom-impl:2.3.0.Nitrogen]
at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.ownershipChanged(ClusterSingletonServiceGroupImpl.java:249)[183:org.opendaylight.mdsal.singleton-dom-impl:2.3.0.Nitrogen]
at org.opendaylight.mdsal.singleton.dom.impl.AbstractClusterSingletonServiceProviderImpl.ownershipChanged(AbstractClusterSingletonServiceProviderImpl.java:146)[183:org.opendaylight.mdsal.singleton-dom-impl:2.3.0.Nitrogen]
at org.opendaylight.mdsal.singleton.dom.impl.DOMClusterSingletonServiceProviderImpl.ownershipChanged(DOMClusterSingletonServiceProviderImpl.java:23)[183:org.opendaylight.mdsal.singleton-dom-impl:2.3.0.Nitrogen]
at org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnershipListenerActor.onEntityOwnershipChanged(EntityOwnershipListenerActor.java:44)[133:org.opendaylight.controller.sal-distributed-datastore:1.6.0.Nitrogen]
at org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnershipListenerActor.handleReceive(EntityOwnershipListenerActor.java:33)[133:org.opendaylight.controller.sal-distributed-datastore:1.6.0.Nitrogen]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:28)[126:org.opendaylight.controller.sal-clustering-commons:1.6.0.Nitrogen]
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:165)[58:com.typesafe.akka.actor:2.4.18]
at akka.actor.Actor$class.aroundReceive(Actor.scala:502)[58:com.typesafe.akka.actor:2.4.18]
at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)[58:com.typesafe.akka.actor:2.4.18]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)[58:com.typesafe.akka.actor:2.4.18]
at akka.actor.ActorCell.invoke(ActorCell.scala:495)[58:com.typesafe.akka.actor:2.4.18]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)[58:com.typesafe.akka.actor:2.4.18]
at akka.dispatch.Mailbox.run(Mailbox.scala:224)[58:com.typesafe.akka.actor:2.4.18]
at akka.dispatch.Mailbox.exec(Mailbox.scala:234)[58:com.typesafe.akka.actor:2.4.18]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[204:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[204:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[204:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[204:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]

Reproduced using:

feature:install odl-bgpcep-bgp-rib-api
(wait to complete)
feature:install odl-bgpcep-bgp-rib-impl