[seam-dev] Seam 2 and JSF 2 problem

I've been trying to track down a problem affecting several of the Seam 2 examples running on JBoss 6. It appears that JSF restoreView is now sometimes calling EL in places it didn't in earlier JSF versions. If that EL involves a conversation-scoped component, the application will fail since the conversation state is not active until after restoreView. Ex: /myView.xhtml contains an <h:dataTable value="#{searchResults}" ... etc/> If the component that provides searchResults does @In for a conversation-scoped component, like ManagedPersistenceContext, the application will now fail. Of course, the view works fine for GET requests, since there is no view being restored. Is this expected behavior for JSF 2, or is it perhaps a bug in the restore view implementation? I'm not familiar enough with the changes in JSF2 yet to know what to expect. Here's a stack trace to give some context. The key problems are around UIViewRoot.processRestoreState and UIData.visitTree. Exception during request processing: Caused by javax.servlet.ServletException with message: "@In attribute requires non-null value: searchService.entityManager" javax.faces.webapp.FacesServlet.service(FacesServlet.java:323) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183) org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95) org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) java.lang.Thread.run(Thread.java:637) Caused by org.jboss.seam.RequiredException with message: "@In attribute requires non-null value: searchService.entityManager" org.jboss.seam.Component.getValueToInject(Component.java:2338) org.jboss.seam.Component.injectAttributes(Component.java:1736) org.jboss.seam.Component.inject(Component.java:1554) org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44) org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185) org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103) actions.SearchService_$$_javassist_seam_4.getSearchResults(SearchService_$$_javassist_seam_4.java) 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) org.jboss.seam.util.Reflections.invoke(Reflections.java:22) org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144) org.jboss.seam.Component.callComponentMethod(Component.java:2249) org.jboss.seam.Component.getInstanceFromFactory(Component.java:2080) org.jboss.seam.Component.getInstance(Component.java:2011) org.jboss.seam.Component.getInstance(Component.java:1983) org.jboss.seam.Component.getInstance(Component.java:1977) org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55) org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50) org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:148) org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:51) javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54) com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72) org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44) org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:190) javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:178) javax.faces.component.UIData.getValue(UIData.java:554) javax.faces.component.UIData.getDataModel(UIData.java:1243) javax.faces.component.UIData.setRowIndex(UIData.java:447) javax.faces.component.UIData.visitTree(UIData.java:1179) javax.faces.component.UIComponent.visitTree(UIComponent.java:1454) javax.faces.component.UIViewRoot.processRestoreState(UIViewRoot.java:868) com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:197) org.jboss.seam.jsf.SeamStateManager.restoreView(SeamStateManager.java:76) com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:131) com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:143) org.jboss.seam.jsf.SeamViewHandler.restoreView(SeamViewHandler.java:93) com.sun.facelets.FaceletViewHandler.restoreView(FaceletViewHandler.java:316) com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:199) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:110) com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) javax.faces.webapp.FacesServlet.service(FacesServlet.java:310) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53) org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183) org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95) org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) java.lang.Thread.run(Thread.java:637)