NPE - ControllerContext in toQName method

2015-01-21 04:00:31,655 | ERROR | qtp2032275313-60 | ContainerResponse | 108 - com.sun.jersey.jersey-server - 1.17.0 | The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NullPointerException
at org.opendaylight.controller.sal.restconf.impl.ControllerContext.toQName(ControllerContext.java:768)[227:org.opendaylight.controller.sal-rest-connector:1.2.0.SNAPSHOT]
at org.opendaylight.controller.sal.restconf.impl.ControllerContext.getRpcDefinition(ControllerContext.java:777)[227:org.opendaylight.controller.sal-rest-connector:1.2.0.SNAPSHOT]
at org.opendaylight.controller.sal.restconf.impl.RestconfImpl.resolveIdentifierInInvokeRpc(RestconfImpl.java:570)[227:org.opendaylight.controller.sal-rest-connector:1.2.0.SNAPSHOT]
at org.opendaylight.controller.sal.restconf.impl.RestconfImpl.invokeRpc(RestconfImpl.java:459)[227:org.opendaylight.controller.sal-rest-connector:1.2.0.SNAPSHOT]
at org.opendaylight.controller.sal.restconf.impl.StatisticsRestconfServiceWrapper.invokeRpc(StatisticsRestconfServiceWrapper.java:72)[227:org.opendaylight.controller.sal-rest-connector:1.2.0.SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_67]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)[:1.7.0_67]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)[:1.7.0_67]
at java.lang.reflect.Method.invoke(Unknown Source)[:1.7.0_67]