I tried to run the cbench test with md-sal data store (drop all packets), and it does not work. I get the following exception:

2014-06-29 21:51:47.420 PDT [md-sal-binding-notification-530] ERROR o.o.o.droptest.AbstractDropTest - Failed to process packet
java.lang.NullPointerException: List node (urn:opendaylight:flow:inventory?revision=2013-08-19)instruction MUST contain leaf (urn:opendaylight:flow:inventory?revision=2013-08-19)order with value.
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:235) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation$ListItemNormalization.createBuilder(DataNormalizationOperation.java:293) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation$CompositeNodeNormalizationOperation.normalize(DataNormalizationOperation.java:175) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation$CompositeNodeNormalizationOperation.normalize(DataNormalizationOperation.java:204) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation$CompositeNodeNormalizationOperation.normalize(DataNormalizationOperation.java:201) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation$CompositeNodeNormalizationOperation.normalize(DataNormalizationOperation.java:204) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer.toNormalized(DataNormalizer.java:114) ~[na:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer.toNormalized(DataNormalizer.java:75) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec.toNormalizedNode(BindingToNormalizedNodeCodec.java:86) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec.toNormalizedNode(BindingToNormalizedNodeCodec.java:78) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedTransaction.doMergeWithEnsureParents(AbstractForwardedTransaction.java:123) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.ForwardedBackwardsCompatibleDataBroker$ForwardedBackwardsCompatibleTransacion.putConfigurationData(ForwardedBackwardsCompatibleDataBroker.java:237) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.ForwardedBackwardsCompatibleDataBroker$ForwardedBackwardsCompatibleTransacion.putConfigurationData(ForwardedBackwardsCompatibleDataBroker.java:188) ~[na:na]
at org.opendaylight.openflowplugin.droptest.DropTestCommiter.processPacket(DropTestCommiter.java:83) ~[bundlefile:na]
at org.opendaylight.openflowplugin.droptest.AbstractDropTest.onPacketReceived(AbstractDropTest.java:121) ~[bundlefile:na]
at org.opendaylight.openflowplugin.droptest.DropTestCommiter$$Broker$ListenerInvoker.onNotification(DropTestCommiter$$Broker$ListenerInvoker.java) [bundlefile:na]
at org.opendaylight.controller.sal.binding.impl.AbstractNotificationListenerRegistration.notify(AbstractNotificationListenerRegistration.java:38) [bundlefile:na]
at org.opendaylight.controller.sal.binding.impl.NotifyTask.run(NotifyTask.java:42) [bundlefile:na]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_60]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_60]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_60]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_60]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_60]

packets are not processed.