HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.enterprise.event.ObserverException sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) java.lang.reflect.Constructor.newInstance(Constructor.java:513) java.lang.Class.newInstance0(Class.java:355) java.lang.Class.newInstance(Class.java:308) org.jboss.weld.util.reflection.SecureReflections$16.work(SecureReflections.java:343) org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52) org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInstantiation(SecureReflectionAccess.java:173) org.jboss.weld.util.reflection.SecureReflections.newInstance(SecureReflections.java:340) org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:33) org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:73) org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:162) org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:241) org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:229) org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:207) org.jboss.weld.manager.BeanManagerImpl.notifyObservers(BeanManagerImpl.java:569) org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:559) org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:554) org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:74) org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) root cause javax.servlet.ServletException: argument type mismatch javax.faces.webapp.FacesServlet.service(FacesServlet.java:606) org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) root cause java.lang.IllegalArgumentException: argument type mismatch sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) javax.faces.component.UIComponentBase$AttributesMap.put(UIComponentBase.java:2399) javax.faces.component.UIComponentBase$AttributesMap.put(UIComponentBase.java:2283) com.sun.faces.facelets.tag.jsf.core.AttributeHandler.apply(AttributeHandler.java:117) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137) org.richfaces.view.facelets.html.BehaviorsAddingComponentHandlerWrapper.applyNextHandler(BehaviorsAddingComponentHandlerWrapper.java:53) com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:195) javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120) javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137) org.richfaces.view.facelets.html.BehaviorsAddingComponentHandlerWrapper.applyNextHandler(BehaviorsAddingComponentHandlerWrapper.java:53) com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:195) javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120) javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137) org.richfaces.view.facelets.html.BehaviorsAddingComponentHandlerWrapper.applyNextHandler(BehaviorsAddingComponentHandlerWrapper.java:53) com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:195) javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) com.sun.faces.facelets.tag.ui.DefineHandler.applyDefinition(DefineHandler.java:107) com.sun.faces.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:178) com.sun.faces.facelets.impl.DefaultFaceletContext$TemplateManager.apply(DefaultFaceletContext.java:395) com.sun.faces.facelets.impl.DefaultFaceletContext.includeDefinition(DefaultFaceletContext.java:366) com.sun.faces.facelets.tag.ui.InsertHandler.apply(InsertHandler.java:112) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137) org.richfaces.view.facelets.html.BehaviorsAddingComponentHandlerWrapper.applyNextHandler(BehaviorsAddingComponentHandlerWrapper.java:53) com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:195) javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) com.sun.faces.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:182) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) com.sun.faces.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:93) javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98) com.sun.faces.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:86) com.sun.faces.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:308) com.sun.faces.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:367) com.sun.faces.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:346) com.sun.faces.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:199) com.sun.faces.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:155) com.sun.faces.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:93) com.sun.faces.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:86) com.sun.faces.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:152) com.sun.faces.application.view.FaceletViewHandlingStrategy.buildView(FaceletViewHandlingStrategy.java:774) org.jboss.seam.faces.view.SeamViewDeclarationLanguage.buildView(SeamViewDeclarationLanguage.java:81) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:100) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) note The full stack trace of the root cause is available in the JBoss Web/7.0.13.Final logs. JBoss Web/7.0.13.Final