2021-01-10T03:13:32,466 | ERROR | epollEventLoopGroup-9-7 | AbstractFuture                   | 30 - com.google.guava - 29.0.0.jre | RuntimeException while executing runnable CallbackListener{org.opendaylight.openflowplugin.impl.services.sal.SalFlowServiceImpl$AddFlowCallback@3cdeaee7} with executor MoreExecutors.directExecutor()
java.lang.NullPointerException: null
        at org.opendaylight.openflowplugin.impl.services.sal.SalFlowServiceImpl$AddFlowCallback.onSuccess(SalFlowServiceImpl.java:226) ~[?:?]
        at org.opendaylight.openflowplugin.impl.services.sal.SalFlowServiceImpl$AddFlowCallback.onSuccess(SalFlowServiceImpl.java:209) ~[?:?]
        at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1089) ~[bundleFile:?]
        at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30) ~[bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1174) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:969) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:738) [bundleFile:?]
        at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:47) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.services.multilayer.MultiLayerFlowService$1.onSuccess(MultiLayerFlowService.java:90) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.services.multilayer.MultiLayerFlowService$1.onSuccess(MultiLayerFlowService.java:69) [bundleFile:?]
        at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1089) [bundleFile:?]
        at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1174) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:969) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:738) [bundleFile:?]
        at com.google.common.util.concurrent.CollectionFuture.handleAllCompleted(CollectionFuture.java:69) [bundleFile:?]
        at com.google.common.util.concurrent.AggregateFuture.processCompleted(AggregateFuture.java:282) [bundleFile:?]
        at com.google.common.util.concurrent.AggregateFuture.decrementCountAndMaybeComplete(AggregateFuture.java:264) [bundleFile:?]
        at com.google.common.util.concurrent.AggregateFuture.access$200(AggregateFuture.java:42) [bundleFile:?]
        at com.google.common.util.concurrent.AggregateFuture$2.run(AggregateFuture.java:176) [bundleFile:?]
        at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1174) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:969) [bundleFile:?]
        at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:738) [bundleFile:?]
        at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:47) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.rpc.AbstractRequestContext.setResult(AbstractRequestContext.java:38) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.services.AbstractRequestCallback.setResult(AbstractRequestCallback.java:44) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.services.SimpleRequestCallback.onSuccess(SimpleRequestCallback.java:44) [bundleFile:?]
        at org.opendaylight.openflowplugin.impl.services.SimpleRequestCallback.onSuccess(SimpleRequestCallback.java:20) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.OutboundQueueEntry.complete(OutboundQueueEntry.java:113) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.StackedSegment.completeRequests(StackedSegment.java:167) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.StackedSegment.completeAll(StackedSegment.java:174) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.AbstractStackedOutboundQueue.pairRequest(AbstractStackedOutboundQueue.java:221) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.AbstractOutboundQueueManager.onMessage(AbstractOutboundQueueManager.java:205) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.ConnectionAdapterImpl.consumeDeviceMessage(ConnectionAdapterImpl.java:175) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.AbstractConnectionAdapterStatistics.consume(AbstractConnectionAdapterStatistics.java:68) [bundleFile:?]
        at org.opendaylight.openflowjava.protocol.impl.core.connection.ConnectionAdapterImpl.consume(ConnectionAdapterImpl.java:65) [bundleFile:?]