Having empty-containers make NormalizedNodeInputStreamReader go beserk

Version Used : Lithium Stable release. Planning to repeat this on Beryllium master – will update on the same.
Cluster : Single-node - restart-with-persistent-data scenario

Test Case (this case is very specific to Openflow inventory model, but this could be a generic issue)
1. Create a group as following via RESTCONF in Config DS (please note that ‘Buckets’ is made intentionally empty)
2. Shutdown controller gracefully or ungracefully
3. Restart the controller
4. Try to read the group from inventory nodes Config DS
5. Read Operation would hang
6. All shards become unrecoverable and reach notinitialized state. All journals to be wiped and controller to be restarted clean-slate

Empty-bucket group addition case
RESTCONF URL :
http://localhost:8080/restconf/config/opendaylight-inventory:nodes/node/openflow:1/group/1

Operation : PUT

Body :
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<group xmlns="urn:opendaylight:flow:inventory">
<group-type>group-indirect</group-type>
<buckets>
<!—EMPTY CONTAINER 
</buckets>
<barrier>false</barrier>
<group-name>Foo1</group-name>
<group-id>1</group-id>
</group>

Exception seen on the logs during RESTART (where NormalizedNodeInputStreamReader kicks-in)

2015-11-05 04:10:44,317 | DEBUG | ult-dispatcher-7 | NormalizedNodeInputStreamReader | 218 - org.opendaylight.controller.sal-clustering-commons - 1.2.1.SNAPSHOT | Muthu: Reading map entry node MAP_ENTRY_NODE qName (urn:opendaylight:inventory?revision=2013-08-19)node keyValueMap

2015-11-05 04:10:44,318 | ERROR | ult-dispatcher-7 | DataTreeCandidatePayload | 226 - org.opendaylight.controller.sal-distributed-datastore - 1.2.1.SNAPSHOT | Muthu : Exception in SUBTREE_MODIFIED case of parseCandidate ModifiedDataTreeCandidateNode {}
com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Revision 'urn:opendaylight:inventory'is not in a supported format
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2203)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache.get(LocalCache.java:3937)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4830)[108:com.google.guava:18.0.0]
at org.opendaylight.controller.cluster.datastore.node.utils.QNameFactory.create(QNameFactory.java:36)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readQName(NormalizedNodeInputStreamReader.java:245)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNormalizedNodeInternal(NormalizedNodeInputStreamReader.java:142)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.addDataContainerChildren(NormalizedNodeInputStreamReader.java:399)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNodeIdentifierDependentNode(NormalizedNodeInputStreamReader.java:188)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNormalizedNodeInternal(NormalizedNodeInputStreamReader.java:151)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.addDataContainerChildren(NormalizedNodeInputStreamReader.java:399)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNodeIdentifierDependentNode(NormalizedNodeInputStreamReader.java:213)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNormalizedNodeInternal(NormalizedNodeInputStreamReader.java:151)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader.readNormalizedNode(NormalizedNodeInputStreamReader.java:86)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeCandidatePayload.readNode(DataTreeCandidatePayload.java:156)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeCandidatePayload.readChildren(DataTreeCandidatePayload.java:127)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeCandidatePayload.parseCandidate(DataTreeCandidatePayload.java:175)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeCandidatePayload.getCandidate(DataTreeCandidatePayload.java:203)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.ShardRecoveryCoordinator.appendRecoveredLogEntry(ShardRecoveryCoordinator.java:70)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.raft.RaftActorRecoverySupport.batchRecoveredLogEntry(RaftActorRecoverySupport.java:162)[219:org.opendaylight.controller.sal-akka-raft:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.raft.RaftActorRecoverySupport.onRecoveredApplyLogEntries(RaftActorRecoverySupport.java:141)[219:org.opendaylight.controller.sal-akka-raft:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.raft.RaftActorRecoverySupport.handleRecoveryMessage(RaftActorRecoverySupport.java:54)[219:org.opendaylight.controller.sal-akka-raft:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.raft.RaftActor.handleRecover(RaftActor.java:160)[219:org.opendaylight.controller.sal-akka-raft:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActor.onReceiveRecover(AbstractUntypedPersistentActor.java:48)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.Shard.onReceiveRecover(Shard.java:213)[226:org.opendaylight.controller.sal-distributed-datastore:1.2.1.SNAPSHOT]
at akka.persistence.UntypedPersistentActor$$anonfun$receiveRecover$1.applyOrElse(Eventsourced.scala:433)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at akka.persistence.Eventsourced$$anonfun$akka$persistence$Eventsourced$$recoveryBehavior$1.applyOrElse(Eventsourced.scala:168)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$class.runReceive(Recovery.scala:48)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.runReceive(Eventsourced.scala:428)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$State$$anonfun$processPersistent$1.apply(Recovery.scala:33)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$State$$anonfun$processPersistent$1.apply(Recovery.scala:33)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$class.withCurrentPersistent(Recovery.scala:185)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.withCurrentPersistent(Eventsourced.scala:428)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$State$class.processPersistent(Recovery.scala:33)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$$anon$1.processPersistent(Recovery.scala:104)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$$anon$1.aroundReceive(Recovery.scala:110)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$class.aroundReceive(Recovery.scala:265)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(Eventsourced.scala:428)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Eventsourced$$anon$1.aroundReceive(Eventsourced.scala:35)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Eventsourced$class.aroundReceive(Eventsourced.scala:369)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.aroundReceive(Eventsourced.scala:428)[216:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)[211:com.typesafe.akka.actor:2.3.10]
at akka.actor.ActorCell.invoke(ActorCell.scala:487)[211:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)[211:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.run(Mailbox.scala:221)[211:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.exec(Mailbox.scala:231)[211:com.typesafe.akka.actor:2.3.10]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[208:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
Caused by: java.lang.IllegalArgumentException: Revision 'urn:opendaylight:inventory'is not in a supported format
at org.opendaylight.yangtools.yang.common.QName.parseRevision(QName.java:351)[110:org.opendaylight.yangtools.yang-common:0.7.1.SNAPSHOT]
at org.opendaylight.yangtools.yang.common.QName.create(QName.java:279)[110:org.opendaylight.yangtools.yang-common:0.7.1.SNAPSHOT]
at org.opendaylight.yangtools.yang.common.QName.create(QName.java:127)[110:org.opendaylight.yangtools.yang-common:0.7.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.QNameFactory$1.load(QNameFactory.java:29)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.node.utils.QNameFactory$1.load(QNameFactory.java:26)[218:org.opendaylight.controller.sal-clustering-commons:1.2.1.SNAPSHOT]
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)[108:com.google.guava:18.0.0]
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)[108:com.google.guava:18.0.0]
... 54 more
Caused by: java.text.ParseException: Unparseable date: "urn:opendaylight:inventory"
at java.text.DateFormat.parse(DateFormat.java:357)[:1.7.0_65]
at org.opendaylight.yangtools.yang.common.QName.parseRevision(QName.java:349)[110:org.opendaylight.yangtools.yang-common:0.7.1.SNAPSHOT]
... 62 more
2015-11-05 04:10:44,319 | ERROR | ult-dispatcher-7 | DataTreeCandidatePayload | 226 - org.opendaylight.controller.sal-distributed-datastore - 1.2.1.SNAPSHOT | Muthu: RotNode is NULL !!!