NPE exception whne connecting controller -- org.opendaylight.ovsdb.southbound.SouthboundMapper.createControllerEntries(SouthboundMapper.java:303)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]

2015-06-16 10:02:58,553 | WARN | ntLoopGroup-12-1 | ConnectionAdapterImpl | 253 - org.opendaylight.openflowjava.openflow-protocol-impl - 0.6.0.SNAPSHOT | received unexpected rpc response: RpcResultKey [xid=13, outputClazz=org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.BarrierOutput]
2015-06-16 10:03:00,127 | WARN | n-invoker-impl-0 | TransactionInvokerImpl | 243 - org.opendaylight.ovsdb.southbound-impl - 1.1.0.SNAPSHOT | Exception invoking Transaction:
java.lang.NullPointerException
at org.opendaylight.ovsdb.southbound.SouthboundMapper.createControllerEntries(SouthboundMapper.java:303)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.OvsdbControllerUpdateCommand.updateController(OvsdbControllerUpdateCommand.java:118)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.OvsdbControllerUpdateCommand.execute(OvsdbControllerUpdateCommand.java:62)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.OvsdbOperationalCommandAggregator.execute(OvsdbOperationalCommandAggregator.java:30)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.TransactionInvokerImpl.run(TransactionInvokerImpl.java:77)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)[:1.7.0_67]
at java.util.concurrent.FutureTask.run(FutureTask.java:262)[:1.7.0_67]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_67]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_67]
at java.lang.Thread.run(Thread.java:745)[:1.7.0_67]
2015-06-16 10:03:05,126 | WARN | n-invoker-impl-0 | TransactionInvokerImpl | 243 - org.opendaylight.ovsdb.southbound-impl - 1.1.0.SNAPSHOT | Exception invoking Transaction:
java.lang.IllegalStateException: Previous transaction member-1-chn-1-txn-5 is not ready yet
at org.opendaylight.controller.cluster.datastore.TransactionChainProxy$Allocated.checkReady(TransactionChainProxy.java:78)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.TransactionChainProxy.allocateWriteTransaction(TransactionChainProxy.java:162)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.TransactionChainProxy.newReadWriteTransaction(TransactionChainProxy.java:143)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.DOMBrokerReadWriteTransaction.createTransaction(DOMBrokerReadWriteTransaction.java:49)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.DOMBrokerReadWriteTransaction.createTransaction(DOMBrokerReadWriteTransaction.java:22)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.AbstractDOMBrokerTransaction.getSubtransaction(AbstractDOMBrokerTransaction.java:57)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.cluster.databroker.DOMBrokerReadWriteTransaction.read(DOMBrokerReadWriteTransaction.java:37)[169:org.opendaylight.controller.sal-distributed-datastore:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedTransaction.doRead(AbstractForwardedTransaction.java:63)[147:org.opendaylight.controller.sal-binding-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMReadWriteTransactionAdapter.read(BindingDOMReadWriteTransactionAdapter.java:31)[147:org.opendaylight.controller.sal-binding-broker-impl:1.2.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.SouthboundUtil.readNode(SouthboundUtil.java:101)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.OvsdbControllerUpdateCommand.getBridgeNodes(OvsdbControllerUpdateCommand.java:141)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]
at org.opendaylight.ovsdb.southbound.transactions.md.OvsdbControllerUpdateCommand.updateController(OvsdbControllerUpdateCommand.java:116)[243:org.opendaylight.ovsdb.southbound-impl:1.1.0.SNAPSHOT]