config-pusher fails in arp-handler module when loading l2switch after openflowplugin

l2switch is not working if the feature set is loaded after loading the openflowplugin-flow-services-ui feature. not working means, pingall is not working with mininet.

steps to reproduce:

install odl-openflowplugin-flow-services-ui
start mininet with linear,2
install odl-l2switch-switch-ui

after a few moments an Exception (below) is seen for config-pusher for the
arp-handler module.

Exception:

Exception in thread "config-pusher" java.lang.IllegalStateException: Error - getInstance() failed for ModuleIdentifier

{factoryName='arp-handler-impl', instanceName='arp-handler-impl'}

in transaction TransactionIdentifier

{name='ConfigTransaction-91-93'}

at org.opendaylight.controller.config.manager.impl.ConfigTransactionControllerImpl.secondPhaseCommit(ConfigTransactionControllerImpl.java:405)
at org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl.secondPhaseCommit(ConfigRegistryImpl.java:280)
at org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl.commitConfig(ConfigRegistryImpl.java:227)
at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:193)
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:175)
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:117)
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:54)
at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:138)
at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:252)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at com.sun.jmx.mbeanserver.MXBeanProxy$InvokeHandler.invoke(MXBeanProxy.java:150)
at com.sun.jmx.mbeanserver.MXBeanProxy.invoke(MXBeanProxy.java:167)
at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:252)
at com.sun.proxy.$Proxy22.commitConfig(Unknown Source)
at org.opendaylight.controller.config.util.ConfigRegistryJMXClient.commitConfig(ConfigRegistryJMXClient.java:102)
at org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider.commitTransaction(TransactionProvider.java:138)
at org.opendaylight.controller.netconf.confignetconfconnector.operations.Commit.handleWithNoSubsequentOperations(Commit.java:54)
at org.opendaylight.controller.netconf.util.mapping.AbstractLastNetconfOperation.handle(AbstractLastNetconfOperation.java:33)
at org.opendaylight.controller.netconf.util.mapping.AbstractNetconfOperation.handle(AbstractNetconfOperation.java:100)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.sendRequestGetResponseCheckIsOK(ConfigPusherImpl.java:342)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.pushConfig(ConfigPusherImpl.java:296)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.pushConfigWithConflictingVersionRetries(ConfigPusherImpl.java:135)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.internalPushConfigs(ConfigPusherImpl.java:103)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.process(ConfigPusherImpl.java:76)
at org.opendaylight.controller.netconf.persist.impl.osgi.ConfigPersisterActivator$InnerCustomizer$1.run(ConfigPersisterActivator.java:181)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.opendaylight.yangtools.binding.data.codec.impl.IncorrectNestingException: Class interface org.opendaylight.yang.gen.v1.urn.opendaylight.l2switch.loopremover.rev140714.StpStatusAwareNodeConnector is not valid child of interface org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector
at org.opendaylight.yangtools.binding.data.codec.impl.IncorrectNestingException.create(IncorrectNestingException.java:28)
at org.opendaylight.yangtools.binding.data.codec.impl.DataContainerCodecContext.childNonNull(DataContainerCodecContext.java:178)
at org.opendaylight.yangtools.binding.data.codec.impl.DataObjectCodecContext.bindingPathArgumentChild(DataObjectCodecContext.java:178)
at org.opendaylight.yangtools.binding.data.codec.impl.BindingCodecContext.getCodecContextNode(BindingCodecContext.java:127)
at org.opendaylight.yangtools.binding.data.codec.impl.InstanceIdentifierCodec.serialize(InstanceIdentifierCodec.java:29)
at org.opendaylight.yangtools.binding.data.codec.impl.InstanceIdentifierCodec.serialize(InstanceIdentifierCodec.java:19)
at org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry.toYangInstanceIdentifier(BindingNormalizedNodeCodecRegistry.java:87)
at org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec.toYangInstanceIdentifierBlocking(BindingToNormalizedNodeCodec.java:99)
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker.registerDataChangeListener(AbstractForwardedDataBroker.java:68)
at org.opendaylight.l2switch.arphandler.core.ProactiveFloodFlowWriter.registerAsDataChangeListener(ProactiveFloodFlowWriter.java:173)
at org.opendaylight.yang.gen.v1.urn.opendaylight.packet.arp.handler.impl.rev140528.ArpHandlerModule.createInstance(ArpHandlerModule.java:51)
at org.opendaylight.controller.config.spi.AbstractModule.getInstance(AbstractModule.java:73)
at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.opendaylight.controller.config.manager.impl.dependencyresolver.DependencyResolverManager$ModuleInvocationHandler.handleInvocation(DependencyResolverManager.java:150)
at com.google.common.reflect.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:87)
at com.sun.proxy.$Proxy78.getInstance(Unknown Source)
at org.opendaylight.controller.config.manager.impl.ConfigTransactionControllerImpl.secondPhaseCommit(ConfigTransactionControllerImpl.java:399)
... 35 more