when starting the controller, i see the following exception:

', capabilities=[urn:opendaylight:params:xml:ns:yang:openflow:common:config:impl?module=openflow-provider-impl&revision=2014-03-26, urn:opendaylight:params:xml:ns:yang:openflow:common:config?module=openflow-provider&revision=2014-03-26, urn:opendaylight:params:xml:ns:yang:openflow:switch:connection:provider:impl?module=openflow-switch-connection-provider-impl&revision=2014-03-28, urn:opendaylight:params:xml:ns:yang:openflow:switch:connection:provider?module=openflow-switch-connection-provider&revision=2014-03-28]}
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.sendRequestGetResponseCheckIsOK(ConfigPusher.java:248) ~[na:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.pushConfig(ConfigPusher.java:199) ~[na:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.pushConfigWithConflictingVersionRetries(ConfigPusher.java:91) ~[na:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.pushConfigs(ConfigPusher.java:68) ~[na:na]
at org.opendaylight.controller.netconf.persist.impl.osgi.ConfigPersisterActivator$InnerCustomizer$1.run(ConfigPersisterActivator.java:156) ~[na:na]
at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_60]
Caused by: org.opendaylight.controller.netconf.api.NetconfDocumentedException: Test phase: {msg-spy-service-impl={msg-spy-service-impl=OpenflowPluginProvider is not accessible!}}
at org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig.EditConfig.executeTests(EditConfig.java:102) ~[na:na]
at org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig.EditConfig.getResponseInternal(EditConfig.java:76) ~[na:na]
at org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig.EditConfig.handleWithNoSubsequentOperations(EditConfig.java:308) ~[na:na]
at org.opendaylight.controller.netconf.util.mapping.AbstractLastNetconfOperation.handle(AbstractLastNetconfOperation.java:33) ~[na:na]
at org.opendaylight.controller.netconf.util.mapping.AbstractNetconfOperation.handle(AbstractNetconfOperation.java:105) ~[na:na]
at org.opendaylight.controller.netconf.persist.impl.ConfigPusher.sendRequestGetResponseCheckIsOK(ConfigPusher.java:243) ~[na:na]
... 5 common frames omitted
Caused by: org.opendaylight.controller.config.api.ValidationException: {msg-spy-service-impl={msg-spy-service-impl=OpenflowPluginProvider is not accessible!}}
at org.opendaylight.controller.config.api.ValidationException.createFromCollectedValidationExceptions(ValidationException.java:61) ~[na:na]
at org.opendaylight.controller.config.manager.impl.ConfigTransactionControllerImpl.validate_noLocks(ConfigTransactionControllerImpl.java:341) ~[na:na]
at org.opendaylight.controller.config.manager.impl.ConfigTransactionControllerImpl.validateConfig(ConfigTransactionControllerImpl.java:316) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_60]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_60]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_60]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_60]
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75) ~[na:1.7.0_60]
at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_60]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_60]
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:193) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:175) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:117) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:54) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:138) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:252) ~[na:1.7.0_60]
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MXBeanProxy$InvokeHandler.invoke(MXBeanProxy.java:150) ~[na:1.7.0_60]
at com.sun.jmx.mbeanserver.MXBeanProxy.invoke(MXBeanProxy.java:167) ~[na:1.7.0_60]
at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:252) ~[na:1.7.0_60]
at com.sun.proxy.$Proxy42.validateConfig(Unknown Source) ~[na:na]
at org.opendaylight.controller.config.util.ConfigTransactionJMXClient.validateConfig(ConfigTransactionJMXClient.java:121) ~[na:na]
at org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider.validateTestTransaction(TransactionProvider.java:155) ~[na:na]
at org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig.EditConfig.test(EditConfig.java:122) ~[na:na]
at org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig.EditConfig.executeTests(EditConfig.java:97) ~[na:na]

This renders the controller inoperable.