Session for the cookie exception should not be occuring

When an app (on top of MD-SAL) attempts to program a flow in a switch that is not connected to the controller, the following exceptions is thrown:

2014-01-23 04:41:37.696 PST [md-sal-binding-notification-35] ERROR o.o.c.s.c.FlowProgrammerAdapter - Execution exception occured during processing flow
java.lang.IllegalArgumentException: Session for the cookie is invalid.
at org.opendaylight.openflowplugin.openflow.md.core.session.MessageDispatchServiceImpl.getConnectionAdapter(MessageDispatchServiceImpl.java:97) ~[na:na]
at org.opendaylight.openflowplugin.openflow.md.core.session.MessageDispatchServiceImpl.flowMod(MessageDispatchServiceImpl.java:128) ~[na:na]
at org.opendaylight.openflowplugin.openflow.md.core.sal.ModelDrivenSwitchImpl.addFlow(ModelDrivenSwitchImpl.java:248) ~[na:na]
at org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService$$Broker$Router.addFlow(SalFlowService$$Broker$Router.java) ~[na:na]
at org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService$$Broker$DirectProxy.addFlow(SalFlowService$$Broker$DirectProxy.java) ~[na:na]
at org.opendaylight.controller.frm.flow.FlowTransaction.add(FlowTransaction.java:114) ~[na:na]
at org.opendaylight.controller.frm.AbstractTransaction.rollbackRpcs(AbstractTransaction.java:112) ~[na:na]
at org.opendaylight.controller.frm.AbstractTransaction.rollback(AbstractTransaction.java:38) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.service.TwoPhaseCommit.rollback(TwoPhaseCommit.java:147) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.service.TwoPhaseCommit.call(TwoPhaseCommit.java:104) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.service.TwoPhaseCommit.call(TwoPhaseCommit.java:31) ~[na:na]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_51]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_51]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_51]
at java.lang.Thread.run(Thread.java:744) [na:1.7.0_51]

This exception should not be thrown, since this is not an error condition in the controller, but in the network. We should log it (INFO level), and/or increment a counter for errors.