ApplicationPeer's write transaction raced

Testing BGP Application Peer performance with bgp-benchmark-app (500k routes injection), the following error occured repeatedly:

2016-07-28 21:17:41,114 | ERROR | on-dispatcher-45 | DataTreeChangeListenerActor | 170 - org.opendaylight.controller.sal-distributed-datastore - 1.3.3.SNAPSHOT | Error notifying listener org.opendaylight.protocol.bgp.rib.impl.ApplicationPeer@16df1141
java.lang.IllegalStateException: New transaction PingPongTransaction

{delegate=org.opendaylight.controller.cluster.databroker.DOMBrokerReadWriteTransaction@645b4850}

raced with transacion null
at org.opendaylight.controller.md.sal.dom.broker.impl.PingPongTransactionChain.slowAllocateTransaction(PingPongTransactionChain.java:136)[143:org.opendaylight.controller.sal-broker-impl:1.3.3.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.PingPongTransactionChain.allocateTransaction(PingPongTransactionChain.java:148)[143:org.opendaylight.controller.sal-broker-impl:1.3.3.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.PingPongTransactionChain.newReadWriteTransaction(PingPongTransactionChain.java:347)[143:org.opendaylight.controller.sal-broker-impl:1.3.3.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.broker.impl.PingPongTransactionChain.newWriteOnlyTransaction(PingPongTransactionChain.java:378)[143:org.opendaylight.controller.sal-broker-impl:1.3.3.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.ApplicationPeer.onDataTreeChanged(ApplicationPeer.java:95)[260:org.opendaylight.bgpcep.bgp-rib-impl:0.5.3.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.dataChanged(DataTreeChangeListenerActor.java:53)[170:org.opendaylight.controller.sal-distributed-datastore:1.3.3.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.handleReceive(DataTreeChangeListenerActor.java:37)[170:org.opendaylight.controller.sal-distributed-datastore:1.3.3.SNAPSHOT]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:34)[166:org.opendaylight.controller.sal-clustering-commons:1.3.3.SNAPSHOT]
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)[155:com.typesafe.akka.actor:2.3.14]
at akka.actor.Actor$class.aroundReceive(Actor.scala:467)[155:com.typesafe.akka.actor:2.3.14]
at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)[155:com.typesafe.akka.actor:2.3.14]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)[155:com.typesafe.akka.actor:2.3.14]
at akka.actor.ActorCell.invoke(ActorCell.scala:487)[155:com.typesafe.akka.actor:2.3.14]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)[155:com.typesafe.akka.actor:2.3.14]
at akka.dispatch.Mailbox.run(Mailbox.scala:220)[155:com.typesafe.akka.actor:2.3.14]
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)[155:com.typesafe.akka.actor:2.3.14]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[152:org.scala-lang.scala-library:2.11.7.v20150622-112736-1fbce4612c]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[152:org.scala-lang.scala-library:2.11.7.v20150622-112736-1fbce4612c]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[152:org.scala-lang.scala-library:2.11.7.v20150622-112736-1fbce4612c]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[152:org.scala-lang.scala-library:2.11.7.v20150622-112736-1fbce4612c]

The regression was introduced by the patch https://git.opendaylight.org/gerrit/#/c/42295/