04:20:13,928 AM [default-akka.actor.default-dispatcher-5] [INFO] Slf4jLogger - Slf4jLogger started
04:20:16,135 AM [default-scheduler-1] [WARN] NetconfDataTreeServiceActor - Haven't received any message for 2 seconds, cancelling transaction and stopping actor
04:20:16,140 AM [default-scheduler-1] [WARN] NetconfDataTreeServiceActor - Haven't received any message for 2 seconds, cancelling transaction and stopping actor
04:20:16,145 AM [default-akka.actor.default-dispatcher-6] [ERROR] OneForOneStrategy - Cannot invoke "com.google.common.util.concurrent.ListenableFuture.addListener(java.lang.Runnable, java.util.concurrent.Executor)" because "future" is null
java.lang.NullPointerException: Cannot invoke "com.google.common.util.concurrent.ListenableFuture.addListener(java.lang.Runnable, java.util.concurrent.Executor)" because "future" is null
	at com.google.common.util.concurrent.Futures.addCallback(Futures.java:1105)
	at org.opendaylight.netconf.topology.singleton.impl.actors.NetconfDataTreeServiceActor.invokeRpcCall(NetconfDataTreeServiceActor.java:156)
	at org.opendaylight.netconf.topology.singleton.impl.actors.NetconfDataTreeServiceActor.onReceive(NetconfDataTreeServiceActor.java:124)
	at akka.actor.UntypedAbstractActor$$anonfun$receive$1.applyOrElse(AbstractActor.scala:332)
	at akka.actor.Actor.aroundReceive(Actor.scala:537)
	at akka.actor.Actor.aroundReceive$(Actor.scala:535)
	at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:579)
	at akka.actor.ActorCell.invoke(ActorCell.scala:547)
	at akka.testkit.CallingThreadDispatcher.process$1(CallingThreadDispatcher.scala:282)
	at akka.testkit.CallingThreadDispatcher.runQueue(CallingThreadDispatcher.scala:315)
	at akka.testkit.CallingThreadDispatcher.dispatch(CallingThreadDispatcher.scala:236)
	at akka.actor.dungeon.Dispatch.sendMessage(Dispatch.scala:163)
	at akka.actor.dungeon.Dispatch.sendMessage$(Dispatch.scala:157)
	at akka.actor.ActorCell.sendMessage(ActorCell.scala:410)
	at akka.actor.Cell.sendMessage(ActorCell.scala:326)
	at akka.actor.Cell.sendMessage$(ActorCell.scala:325)
	at akka.actor.ActorCell.sendMessage(ActorCell.scala:410)
	at akka.actor.LocalActorRef.$bang(ActorRef.scala:448)
	at akka.actor.Scheduler$$anon$6.run(Scheduler.scala:445)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:49)
	at akka.testkit.CallingThreadDispatcher.executeTask(CallingThreadDispatcher.scala:241)
	at akka.dispatch.MessageDispatcher.unbatchedExecute(AbstractDispatcher.scala:166)
	at akka.dispatch.BatchingExecutor.execute(BatchingExecutor.scala:133)
	at akka.dispatch.BatchingExecutor.execute$(BatchingExecutor.scala:124)
	at akka.dispatch.MessageDispatcher.execute(AbstractDispatcher.scala:96)
	at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:365)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.executeBucket$1(LightArrayRevolverScheduler.scala:314)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.nextTick(LightArrayRevolverScheduler.scala:318)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.run(LightArrayRevolverScheduler.scala:270)
	at java.base/java.lang.Thread.run(Thread.java:833)
04:20:16,151 AM [default-akka.actor.default-dispatcher-6] [ERROR] OneForOneStrategy - Cannot invoke "com.google.common.util.concurrent.ListenableFuture.addListener(java.lang.Runnable, java.util.concurrent.Executor)" because "future" is null
java.lang.NullPointerException: Cannot invoke "com.google.common.util.concurrent.ListenableFuture.addListener(java.lang.Runnable, java.util.concurrent.Executor)" because "future" is null
	at com.google.common.util.concurrent.Futures.addCallback(Futures.java:1105)
	at org.opendaylight.netconf.topology.singleton.impl.actors.NetconfDataTreeServiceActor.invokeRpcCall(NetconfDataTreeServiceActor.java:156)
	at org.opendaylight.netconf.topology.singleton.impl.actors.NetconfDataTreeServiceActor.onReceive(NetconfDataTreeServiceActor.java:124)
	at akka.actor.UntypedAbstractActor$$anonfun$receive$1.applyOrElse(AbstractActor.scala:332)
	at akka.actor.Actor.aroundReceive(Actor.scala:537)
	at akka.actor.Actor.aroundReceive$(Actor.scala:535)
	at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:579)
	at akka.actor.ActorCell.invoke(ActorCell.scala:547)
	at akka.testkit.CallingThreadDispatcher.process$1(CallingThreadDispatcher.scala:282)
	at akka.testkit.CallingThreadDispatcher.runQueue(CallingThreadDispatcher.scala:315)
	at akka.testkit.CallingThreadDispatcher.dispatch(CallingThreadDispatcher.scala:236)
	at akka.actor.dungeon.Dispatch.sendMessage(Dispatch.scala:163)
	at akka.actor.dungeon.Dispatch.sendMessage$(Dispatch.scala:157)
	at akka.actor.ActorCell.sendMessage(ActorCell.scala:410)
	at akka.actor.Cell.sendMessage(ActorCell.scala:326)
	at akka.actor.Cell.sendMessage$(ActorCell.scala:325)
	at akka.actor.ActorCell.sendMessage(ActorCell.scala:410)
	at akka.actor.LocalActorRef.$bang(ActorRef.scala:448)
	at akka.actor.Scheduler$$anon$6.run(Scheduler.scala:445)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:49)
	at akka.testkit.CallingThreadDispatcher.executeTask(CallingThreadDispatcher.scala:241)
	at akka.dispatch.MessageDispatcher.unbatchedExecute(AbstractDispatcher.scala:166)
	at akka.dispatch.BatchingExecutor.execute(BatchingExecutor.scala:133)
	at akka.dispatch.BatchingExecutor.execute$(BatchingExecutor.scala:124)
	at akka.dispatch.MessageDispatcher.execute(AbstractDispatcher.scala:96)
	at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:365)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.executeBucket$1(LightArrayRevolverScheduler.scala:314)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.nextTick(LightArrayRevolverScheduler.scala:318)
	at akka.actor.LightArrayRevolverScheduler$$anon$3.run(LightArrayRevolverScheduler.scala:270)
	at java.base/java.lang.Thread.run(Thread.java:833)
04:20:16,159 AM [default-scheduler-1] [WARN] NetconfDataTreeServiceActor - Haven't received any message for 2 seconds, cancelling transaction and stopping actor
04:20:16,170 AM [default-akka.actor.default-dispatcher-6] [INFO] DeadLetterActorRef - Message [org.opendaylight.netconf.topology.singleton.messages.rpc.InvokeRpcMessageReply] from TestActor[akka://default/user/$$x] to Actor[akka://default/deadLetters] was not delivered. [1] dead letters encountered. If this is not an expected behavior then Actor[akka://default/deadLetters] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
04:20:16,171 AM [default-akka.actor.default-dispatcher-6] [INFO] DeadLetterActorRef - Message [org.opendaylight.netconf.topology.singleton.messages.rpc.InvokeRpcMessageReply] from TestActor[akka://default/user/$$x] to Actor[akka://default/deadLetters] was not delivered. [2] dead letters encountered. If this is not an expected behavior then Actor[akka://default/deadLetters] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
04:20:16,303 AM [default-akka.actor.default-dispatcher-7] [INFO] CoordinatedShutdown - Running CoordinatedShutdown with reason [ActorSystemTerminateReason]