2017-11-08 04:21:53,677 | WARN  | ntLoopGroup-7-32 | ContextChainHolderImpl           | 307 - org.opendaylight.openflowplugin.impl - 0.4.2.Carbon-redhat-2 | Not able to set MASTER role on device openflow:691006690958, reason: Initial transaction cannot be submitted.
2017-11-08 04:21:53,677 | WARN  | ntLoopGroup-7-32 | ContextChainHolderImpl           | 307 - org.opendaylight.openflowplugin.impl - 0.4.2.Carbon-redhat-2 | This mastering is mandatory, destroying context chain and closing connection for device openflow:691006690958.
2017-11-08 04:21:53,678 | ERROR | t-dispatcher-116 | ClusterSingletonServiceGroupImpl | 167 - org.opendaylight.mdsal.singleton-dom-impl - 2.2.2.Carbon-redhat-2 | Service group openflow:181281860492823 failed to take ownership
org.opendaylight.mdsal.eos.common.api.CandidateAlreadyRegisteredException: Candidate has already been registered for DOMEntity [type=org.opendaylight.mdsal.AsyncServiceCloseEntityType, id=/(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)entity/entity[{(urn:opendaylight:params:xml:ns:yang:mdsal:core:general-entity?revision=2015-09-30)name=openflow:181281860492823}]]
	at org.opendaylight.controller.cluster.datastore.entityownership.DistributedEntityOwnershipService.registerCandidate(DistributedEntityOwnershipService.java:149)[211:org.opendaylight.controller.sal-distributed-datastore:1.5.2.Carbon-redhat-2]
	at org.opendaylight.controller.cluster.datastore.entityownership.DistributedEntityOwnershipService.registerCandidate(DistributedEntityOwnershipService.java:64)[211:org.opendaylight.controller.sal-distributed-datastore:1.5.2.Carbon-redhat-2]
	at Proxybcde5c9b_33b0_4a01_9527_cc5efeccde97.registerCandidate(Unknown Source)[:]
	at Proxy69f4a9bf_f30a_4d04_ac61_ec0df241abdb.registerCandidate(Unknown Source)[:]
	at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.takeOwnership(ClusterSingletonServiceGroupImpl.java:625)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.serviceOwnershipChanged(ClusterSingletonServiceGroupImpl.java:572)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.lockedOwnershipChanged(ClusterSingletonServiceGroupImpl.java:451)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.mdsal.singleton.dom.impl.ClusterSingletonServiceGroupImpl.ownershipChanged(ClusterSingletonServiceGroupImpl.java:433)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.mdsal.singleton.dom.impl.AbstractClusterSingletonServiceProviderImpl.ownershipChanged(AbstractClusterSingletonServiceProviderImpl.java:234)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.mdsal.singleton.dom.impl.DOMClusterSingletonServiceProviderImpl.ownershipChanged(DOMClusterSingletonServiceProviderImpl.java:23)[167:org.opendaylight.mdsal.singleton-dom-impl:2.2.2.Carbon-redhat-2]
	at org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnershipListenerActor.onEntityOwnershipChanged(EntityOwnershipListenerActor.java:44)[211:org.opendaylight.controller.sal-distributed-datastore:1.5.2.Carbon-redhat-2]
	at org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnershipListenerActor.handleReceive(EntityOwnershipListenerActor.java:33)[211:org.opendaylight.controller.sal-distributed-datastore:1.5.2.Carbon-redhat-2]
	at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:38)[204:org.opendaylight.controller.sal-clustering-commons:1.5.2.Carbon-redhat-2]
	at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:165)[185:com.typesafe.akka.actor:2.4.18]
	at akka.actor.Actor$class.aroundReceive(Actor.scala:502)[185:com.typesafe.akka.actor:2.4.18]
	at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)[185:com.typesafe.akka.actor:2.4.18]
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)[185:com.typesafe.akka.actor:2.4.18]
	at akka.actor.ActorCell.invoke(ActorCell.scala:495)[185:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)[185:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.run(Mailbox.scala:224)[185:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)[185:com.typesafe.akka.actor:2.4.18]
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[181:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[181:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[181:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[181:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]