2017-11-20 03:17:20,695 | INFO  | ult-dispatcher-6 | StatisticsContextImpl            | 281 - org.opendaylight.openflowplugin.impl - 0.4.3.SNAPSHOT | Starting statistics context cluster services for node openflow:88256775084985
2017-11-20 03:17:20,696 | ERROR | lt-dispatcher-25 | ExecutionList                    | 57 - com.google.guava - 18.0.0 | RuntimeException while executing runnable com.google.common.util.concurrent.Futures$6@3546a15e with executor INSTANCE
java.util.ConcurrentModificationException
	at com.google.common.collect.HashBiMap$Itr.checkForConcurrentModification(HashBiMap.java:339)[57:com.google.guava:18.0.0]
	at com.google.common.collect.HashBiMap$Itr.hasNext(HashBiMap.java:345)[57:com.google.guava:18.0.0]
	at org.opendaylight.openflowplugin.impl.registry.flow.DeviceFlowRegistryImpl.getExistingKey(DeviceFlowRegistryImpl.java:284)[281:org.opendaylight.openflowplugin.impl:0.4.3.SNAPSHOT]
	at org.opendaylight.openflowplugin.impl.registry.flow.DeviceFlowRegistryImpl.lambda$new$0(DeviceFlowRegistryImpl.java:67)[281:org.opendaylight.openflowplugin.impl:0.4.3.SNAPSHOT]
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1380)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1380)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)[:1.8.0_151]
	at java.util.Collections$2.tryAdvance(Collections.java:4717)[:1.8.0_151]
	at java.util.Collections$2.forEachRemaining(Collections.java:4725)[:1.8.0_151]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)[:1.8.0_151]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)[:1.8.0_151]
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)[:1.8.0_151]
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)[:1.8.0_151]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)[:1.8.0_151]
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)[:1.8.0_151]
	at org.opendaylight.openflowplugin.impl.registry.flow.DeviceFlowRegistryImpl$1.onSuccess(DeviceFlowRegistryImpl.java:132)[281:org.opendaylight.openflowplugin.impl:0.4.3.SNAPSHOT]
	at org.opendaylight.openflowplugin.impl.registry.flow.DeviceFlowRegistryImpl$1.onSuccess(DeviceFlowRegistryImpl.java:120)[281:org.opendaylight.openflowplugin.impl:0.4.3.SNAPSHOT]
	at com.google.common.util.concurrent.Futures$6.run(Futures.java:1319)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:457)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:156)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:145)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:185)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.Futures$ChainingListenableFuture$1.run(Futures.java:918)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:457)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.Futures$ImmediateFuture.addListener(Futures.java:106)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.Futures$ChainingListenableFuture.run(Futures.java:914)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:457)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:156)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:145)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:185)[57:com.google.guava:18.0.0]
	at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:53)[57:com.google.guava:18.0.0]
	at org.opendaylight.controller.cluster.datastore.messages.ReadData.processResponse(ReadData.java:40)[203:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at org.opendaylight.controller.cluster.datastore.RemoteTransactionContext$1.onComplete(RemoteTransactionContext.java:187)[203:org.opendaylight.controller.sal-distributed-datastore:1.5.3.SNAPSHOT]
	at akka.dispatch.OnComplete.internal(Future.scala:259)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.OnComplete.internal(Future.scala:256)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.japi$CallbackBridge.apply(Future.scala:186)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.japi$CallbackBridge.apply(Future.scala:183)[177:com.typesafe.akka.actor:2.4.18]
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)[173:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:91)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)[177:com.typesafe.akka.actor:2.4.18]
	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)[173:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:90)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39)[177:com.typesafe.akka.actor:2.4.18]
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:415)[177:com.typesafe.akka.actor:2.4.18]
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[173:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[173:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[173:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc]