Li-Plugin: Transaction failure exception in 3-node cluster while processing port statistics

I am testing net-virt with openflowplugin lithium plugin in 3-node cluster environment. Whenever OVSDB connects to net-virt, it creates the bridge and set the controller of the bridge to all the three controllers in the 3-node cluster. Whichever instance of openflowplugin become the owner of the openflow bridge, it starts throwing following exception while processing the port statisitics

2016-05-11 07:25:47,207 | INFO | ntLoopGroup-11-4 | LifecycleConductorImpl | 289 - org.opendaylight.openflowplugin.impl - 0.3.0.SNAPSHOT | Starting/Stopping services for node Uri [_value=openflow:82098239239489] was successful
2016-05-11 07:25:48,676 | WARN | ntLoopGroup-11-4 | StatisticsGatheringUtils | 289 - org.opendaylight.openflowplugin.impl - 0.3.0.SNAPSHOT | stats processing of type OFPMPPORTSTATS for node Uri [_value=openflow:82098239239489] failed during write-to-tx step
java.lang.IllegalStateException: Transaction DOM-CHAIN-2-3 is no longer running
at com.google.common.base.Preconditions.checkState(Preconditions.java:197)[65:com.google.guava:18.0.0]
at org.opendaylight.controller.cluster.databroker.AbstractDOMBrokerWriteTransaction.checkRunning(AbstractDOMBrokerWriteTransaction.java:145)[181:org.opendaylight.controller.sal-distributed-datastore:1.4.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.AbstractDOMBrokerWriteTransaction.put(AbstractDOMBrokerWriteTransaction.java:74)[181:org.opendaylight.controller.sal-distributed-datastore:1.4.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.dom.spi.ForwardingDOMDataReadWriteTransaction.put(ForwardingDOMDataReadWriteTransaction.java:49)[150:org.opendaylight.controller.sal-core-spi:1.4.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.AbstractWriteTransaction.put(AbstractWriteTransaction.java:46)[153:org.opendaylight.controller.sal-binding-broker-impl:1.4.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMWriteTransactionAdapter.put(BindingDOMWriteTransactionAdapter.java:40)[153:org.opendaylight.controller.sal-binding-broker-impl:1.4.0.SNAPSHOT]
at org.opendaylight.openflowplugin.impl.device.TransactionChainManager.writeToTransaction(TransactionChainManager.java:208)[289:org.opendaylight.openflowplugin.impl:0.3.0.SNAPSHOT]
at org.opendaylight.openflowplugin.impl.device.DeviceContextImpl.writeToTransaction(DeviceContextImpl.java:328)[289:org.opendaylight.openflowplugin.impl:0.3.0.SNAPSHOT]
at org.opendaylight.openflowplugin.impl.statistics.StatisticsGatheringUtils.processNodeConnectorStatistics(StatisticsGatheringUtils.java:380)[289:org.opendaylight.openflowplugin.impl:0.3.0.SNAPSHOT

Full log file for one of the controller from 3-node cluster is attached with the bug.