Clustering : Exception in BGP scale test

BGP scale tests 100k routes failed on following exception:

2015-05-11 12:57:40,915 | ERROR | ult-dispatcher-2 | Shard | 205 - org.opendaylight.controller.sal-akka-raft - 1.2.0.SNAPSHOT | member-1-shard-default-operational: Error handling BatchedModifications for Tx member-1-txn-313834
java.lang.IllegalStateException: Transaction ReadWriteShardDataTreeTransaction{id=member-1-txn-313834, closed=false, snapshot=MutableDataTree [modification=NodeModification [identifier=(urn:ietf:params:xml:ns:netconf:base:1.0)data, modificationType=TOUCH, childModification={....very long body...}} is open
at com.google.common.base.Preconditions.checkState(Preconditions.java:197)[94:com.google.guava:18.0.0]
at org.opendaylight.controller.cluster.datastore.ShardDataTreeTransactionChain.getSnapshot(ShardDataTreeTransactionChain.java:37)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.ShardDataTreeTransactionChain.newReadWriteTransaction(ShardDataTreeTransactionChain.java:54)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.ShardDataTree.newReadWriteTransaction(ShardDataTree.java:92)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.handleBatchedModifications(ShardCommitCoordinator.java:163)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.Shard.handleBatchedModifications(Shard.java:423)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.Shard.onReceiveCommand(Shard.java:228)[212:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at akka.persistence.UntypedPersistentActor.onReceive(Eventsourced.scala:430)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at org.opendaylight.controller.cluster.common.actor.MeteringBehavior.apply(MeteringBehavior.java:97)[204:org.opendaylight.controller.sal-clustering-commons:1.2.0.SNAPSHOT]
at akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:534)[197:com.typesafe.akka.actor:2.3.10]
at akka.persistence.Recovery$State$class.process(Recovery.scala:30)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.ProcessorImpl$$anon$2.process(Processor.scala:103)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.ProcessorImpl$$anon$2.aroundReceive(Processor.scala:114)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Recovery$class.aroundReceive(Recovery.scala:265)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.akka$persistence$Eventsourced$$super$aroundReceive(Eventsourced.scala:428)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Eventsourced$$anon$2.doAroundReceive(Eventsourced.scala:82)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Eventsourced$$anon$2.aroundReceive(Eventsourced.scala:78)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.Eventsourced$class.aroundReceive(Eventsourced.scala:369)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.persistence.UntypedPersistentActor.aroundReceive(Eventsourced.scala:428)[202:com.typesafe.akka.persistence.experimental:2.3.10]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)[197:com.typesafe.akka.actor:2.3.10]
at akka.actor.ActorCell.invoke(ActorCell.scala:487)[197:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)[197:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.run(Mailbox.scala:221)[197:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.Mailbox.exec(Mailbox.scala:231)[197:com.typesafe.akka.actor:2.3.10]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[194:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)[194:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)[194:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[194:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[194:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
2015-05-11 12:57:42,092 | WARN | lt-dispatcher-16 | Shard | 205 - org.opendaylight.controller.sal-akka-raft - 1.2.0.SNAPSHOT | member-1-shard-default-operational: Transaction member-1-txn-313834 was timed out of the cache
2015-05-11 12:58:14,430 | WARN | lt-dispatcher-14 | TransactionProxy | 212 - org.opendaylight.controller.sal-distributed-datastore - 1.2.0.SNAPSHOT | Failed to acquire operation permit for transaction member-1-txn-313834