REST Error

13:08:15,451 WARN  [org.kie.services.remote.rest.exception.DescriptiveExceptionHandler] (http-localhost/127.0.0.1:8080-4) Exception thrown when processing request [/runtime/org.jbpm:HR:1.0/process/hiring/start]; responding with status -1: java.lang.IllegalStateException: Unable to create new JAXBContext instance.
	at org.kie.services.remote.rest.jaxb.DynamicJAXBContext.getContext(DynamicJAXBContext.java:173) [kie-services-remote-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at org.kie.services.remote.rest.jaxb.DynamicJAXBContext.createMarshaller(DynamicJAXBContext.java:102) [kie-services-remote-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at org.kie.services.remote.rest.jaxb.DynamicJAXBContext$Proxy$_$$_WeldClientProxy.createMarshaller(DynamicJAXBContext$Proxy$_$$_WeldClientProxy.java) [kie-services-remote-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.getMarshaller(AbstractJAXBProvider.java:167) [resteasy-jaxb-provider-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.writeTo(AbstractJAXBProvider.java:142) [resteasy-jaxb-provider-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.providers.jackson.JacksonJsonpInterceptor.write(JacksonJsonpInterceptor.java:112) [resteasy-jackson-provider-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:104) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:250) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:602) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:528) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70) [jbpm-designer-backend-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.uberfire.security.server.UberFireSecurityFilter.doFilter(UberFireSecurityFilter.java:283) [uberfire-security-server-0.4.0-SNAPSHOT.jar:0.4.0-SNAPSHOT]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:407) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:408) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
	at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_40]
Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
org.kie.api.task.model.User is an interface, and JAXB can't handle interfaces.
	this problem is related to the following location:
		at org.kie.api.task.model.User
		at public org.kie.api.task.model.User org.jbpm.services.task.query.TaskSummaryImpl.getActualOwner()
		at org.jbpm.services.task.query.TaskSummaryImpl
		at private java.util.List org.kie.services.client.serialization.jaxb.impl.task.JaxbTaskSummaryListResponse.taskSummaryList
		at org.kie.services.client.serialization.jaxb.impl.task.JaxbTaskSummaryListResponse

	at com.sun.xml.bind.v2.runtime.IllegalAnnotationsException$Builder.check(IllegalAnnotationsException.java:106) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:466) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:298) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:141) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1163) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:145) [jaxb-impl-2.2.5-redhat-5.jar:2.2.5-redhat-5]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_40]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_40]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_40]
	at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_40]
	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:211) [jboss-jaxb-api_2.2_spec-1.0.4.Final-redhat-2.jar:1.0.4.Final-redhat-2]
	at javax.xml.bind.ContextFinder.find(ContextFinder.java:392) [jboss-jaxb-api_2.2_spec-1.0.4.Final-redhat-2.jar:1.0.4.Final-redhat-2]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:618) [jboss-jaxb-api_2.2_spec-1.0.4.Final-redhat-2.jar:1.0.4.Final-redhat-2]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:565) [jboss-jaxb-api_2.2_spec-1.0.4.Final-redhat-2.jar:1.0.4.Final-redhat-2]
	at org.kie.services.remote.rest.jaxb.DynamicJAXBContext.getContext(DynamicJAXBContext.java:168) [kie-services-remote-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	... 46 more