This WARN shows in functional test log and it seems harmless, however it floods the scale test log so I think it is better to fix it (maybe SR1):
2019-03-12T18:12:06,995 | WARN | opendaylight-cluster-data-notification-dispatcher-48 | EffectiveRibInWriter | 237 - org.opendaylight.bgpcep.bgp-rib-impl - 0.11.0.SNAPSHOT | Ignoring unhandled route ChildNode{mod = NodeModification [identifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)ipv4-route[{(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)path-id=0, (urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)route-key=8.193.74.240/28}], modificationType=WRITE, childModification={}], oldMeta = null, newMeta = SimpleContainerNode{version=org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version@1c049dc5, data=ImmutableMapEntryNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)ipv4-route[{(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)path-id=0, (urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)route-key=8.193.74.240/28}], value=[ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)prefix, value=8.193.74.240/28}, ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)route-key, value=8.193.74.240/28}, ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)path-id, value=0}, ImmutableContainerNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)attributes, value=[ImmutableContainerNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)origin, value=[ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)value, value=igp}]}, ImmutableChoiceNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)c-next-hop, value=[ImmutableContainerNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)ipv4-next-hop, value=[ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)global, value=192.0.2.1}]}]}, ImmutableContainerNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)local-pref, value=[ImmutableLeafNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)pref, value=100}]}, ImmutableMapNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)unrecognized-attributes, value=[]}, ImmutableContainerNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)as-path, value=[ImmutableUnkeyedListNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)segments, value=[ImmutableUnkeyedListEntryNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)segments, value=[ImmutableOrderedLeafSetNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)as-sequence, value=UnmodifiableCollection{[ImmutableLeafSetEntryNode{nodeIdentifier=(urn:opendaylight:params:xml:ns:yang:bgp-inet?revision=2018-03-29)as-sequence[64496], value=64496}]}}]}]}]}]}]}}}