Hi,
I find below netconf issue with Honeycomd. I am not sure if this is SFC issue or honeycomb. The V3po yang file has 2 version in the cache.. SFC is using the old version.

next keepalive in 60 SECONDS
2018-05-14 23:17:52,983 | TRACE | oupCloseable-3-1 | WriteCandidateTx                 | 315 - org.opendaylight.netconf.sal-netconf-connector - 1.6.2 | Lock candidate successful
2018-05-14 23:17:52,986 | ERROR | n-dispatcher-225 | DataTreeChangeListenerActor      | 262 - org.opendaylight.controller.sal-clustering-commons - 1.6.2 | member-1-shard-default-config: Error notifying listener org.opendaylight.sfc.scfvpprenderer.listeners.SfcScfVppDataListener@34847f1b
java.lang.NullPointerException: Cannot find (urn:opendaylight:params:xml:ns:yang:v3po?revision=2016-12-14)vpp node in schema context. Instance identifier has to start from root
        at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:876)[56:com.google.guava:22.0.0]
        at org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes.fromInstanceId(ImmutableNodes.java:134)[113:org.opendaylight.yangtools.yang-data-impl:1.2.2]
        at org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.createEditConfigAnyxml(NetconfMessageTransformUtil.java:316)[315:org.opendaylight.netconf.sal-netconf-connector:1.6.2]
        at org.opendaylight.netconf.sal.connect.netconf.util.NetconfRpcStructureTransformer.createEditConfigStructure(NetconfRpcStructureTransformer.java:41)[315:org.opendaylight.netconf.sal-netconf-connector:1.6.2]
        at org.opendaylight.netconf.sal.connect.netconf.util.NetconfBaseOps.createEditConfigStrcture(NetconfBaseOps.java:291)[315:org.opendaylight.netconf.sal-netconf-connector:1.6.2]
        at org.opendaylight.netconf.sal.connect.netconf.sal.tx.AbstractWriteTx.put(AbstractWriteTx.java:106)[315:org.opendaylight.netconf.sal-netconf-connector:1.6.2]
        at org.opendaylight.controller.md.sal.binding.impl.AbstractWriteTransaction.put(AbstractWriteTransaction.java:46)[256:org.opendaylight.controller.sal-binding-broker-impl:1.6.2]
        at org.opendaylight.controller.md.sal.binding.impl.BindingDOMWriteTransactionAdapter.put(BindingDOMWriteTransactionAdapter.java:40)[256:org.opendaylight.controller.sal-binding-broker-impl:1.6.2]
        at org.opendaylight.sfc.util.vpp.SfcVppUtils.addDummyBridgeDomain(SfcVppUtils.java:317)[325:org.opendaylight.sfc.vpp-utils:0.6.2]
        at org.opendaylight.sfc.scfvpprenderer.processors.VppClassifierProcessor.configureVxlanGpeClassifier(VppClassifierProcessor.java:439)[323:org.opendaylight.sfc.scf-vpp:0.6.2]
        at org.opendaylight.sfc.scfvpprenderer.processors.VppClassifierProcessor.addScf(VppClassifierProcessor.java:604)[323:org.opendaylight.sfc.scf-vpp:0.6.2]
        at org.opendaylight.sfc.scfvpprenderer.listeners.SfcScfVppDataListener.add(SfcScfVppDataListener.java:64)[323:org.opendaylight.sfc.scf-vpp:0.6.2]
        at org.opendaylight.sfc.scfvpprenderer.listeners.SfcScfVppDataListener.add(SfcScfVppDataListener.java:30)[323:org.opendaylight.sfc.scf-vpp:0.6.2]
        at org.opendaylight.sfc.provider.listeners.AbstractDataTreeChangeListener.onDataTreeChanged(AbstractDataTreeChangeListener.java:43)[322:org.opendaylight.sfc.provider:0.6.2]
        at org.opendaylight.controller.md.sal.binding.impl.BindingDOMDataTreeChangeListenerAdapter.onDataTreeChanged(BindingDOMDataTreeChangeListenerAdapter.java:41)[256:org.opendaylight.controller.sal-binding-broker-impl:1.6.2]
        at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.dataChanged(DataTreeChangeListenerActor.java:67)[269:org.opendaylight.controller.sal-distributed-datastore:1.6.2]
        at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.handleReceive(DataTreeChangeListenerActor.java:41)[269:org.opendaylight.controller.sal-distributed-datastore:1.6.2]
        at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:38)[262:org.opendaylight.controller.sal-clustering-commons:1.6.2]
        at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:165)[143:com.typesafe.akka.actor:2.4.18]