No local or remote implementation available for OF plugin's RPC

The issue happened in the CSIT for the stable/boron branches on 09/07.
I've never seen this failure before, so I'm gussing this is a regression which was introduced recently.

[VTN CSIT]

• build #66 - https://jenkins.opendaylight.org/releng/view/vtn/job/vtn-csit-3node-manager-all-boron/66/

The test failure was that the VTN feature failed to control OpenFlow switches.
That's because the implmentation was not available for OF plugin's RPC.

I've seen the following log messages with the issue.

2016-09-07 13:00:43,142 | WARN (snip) org.opendaylight.controller.sal-remoterpc-connector - 1.4.0.SNAPSHOT | Timed out finding routers for RouteIdentifierImpl{context=null, type=(urn:opendaylight:packet:service?revision=2013-07-09)transmit-packet, route=/(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:1}

]}

2016-09-07 13:00:43,189 | WARN (snip) org.opendaylight.controller.sal-remoterpc-connector - 1.4.0.SNAPSHOT | Timed out finding routers for RouteIdentifierImpl{context=null, type=(urn:opendaylight:flow:service?revision=2013-08-19)remove-flow, route=/(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:2}

]}

2016-09-07 13:00:43,189 | WARN (snip) org.opendaylight.controller.sal-remoterpc-connector - 1.4.0.SNAPSHOT | Timed out finding routers for RouteIdentifierImpl{context=null, type=(urn:opendaylight:flow:transaction?revision=2015-03-04)send-barrier, route=/(urn:opendaylight:inventory?revision=2013-08-19)nodes/node/node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:2}

]}

2016-09-07 13:00:43,190 | ERROR (snip) org.opendaylight.vtn.manager.implementation - 0.5.0.SNAPSHOT | send-barrier RPC has thrown an exception: node=openflow:2
org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationNotAvailableException: No local or remote implementation available for rpc AbsoluteSchemaPath

{path=[(urn:opendaylight:flow:transaction?revision=2015-03-04)send-barrier]}

at org.opendaylight.controller.remote.rpc.RemoteRpcImplementation$1.onComplete(RemoteRpcImplementation.java:66)[167:org.opendaylight.controller.sal-remoterpc-connector:1.4.0.SNAPSHOT]

2016-09-07 13:00:43,190 | ERROR (snip) org.opendaylight.vtn.manager.implementation - 0.5.0.SNAPSHOT | Failed to remove VTN flows in openflow:2
org.opendaylight.vtn.manager.VTNException: No local or remote implementation available for rpc AbsoluteSchemaPath

{path=[(urn:opendaylight:flow:service?revision=2013-08-19)remove-flow]}

(snip)
Caused by: org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationNotAvailableException: No local or remote implementation available for rpc AbsoluteSchemaPath

{path=[(urn:opendaylight:flow:service?revision=2013-08-19)remove-flow]}

at org.opendaylight.controller.remote.rpc.RemoteRpcImplementation$1.onComplete(RemoteRpcImplementation.java:66)[167:org.opendaylight.controller.sal-remoterpc-connector:1.4.0.SNAPSHOT]
at org.opendaylight.controller.remote.rpc.RemoteRpcImplementation$1.onComplete(RemoteRpcImplementation.java:56)[167:org.opendaylight.controller.sal-remoterpc-connector:1.4.0.SNAPSHOT]

You can find the complete log messages in the following location:
https://logs.opendaylight.org/releng/jenkins092/vtn-csit-3node-manager-all-boron/66/archives/odl3_karaf.log.gz