com.sun.faces.context.FacesContextImpl.assertNotReleased上的java.lang.IllegalStateException

如果我按提交button错误消息被抛出服务器日志

login.xhtml

 <h:form> <p:panel header="Login"> <p:messages id="msgs" showDetail="true"/> <h:panelGrid columns="2" columnClasses="column" cellpadding="5"> <h:outputLabel for="user" value="Username" /> <h:inputText id="user" value="#{login.username}" /> <h:outputLabel for="pw" value="Passwort" /> <h:inputSecret id="pw" redisplay="false" value="#{login.password}" /> </h:panelGrid> <p:commandButton value="Anmelden" action="#{login.login}" type="submit" update="msgs" /> </p:panel> </h:form> 

Login.java

 @ManagedBean @ViewScoped public class Login { private FacesContext fCtx; private String username; private String password; public Login() { fCtx = FacesContext.getCurrentInstance(); } public String login(){ // HttpSession session = (HttpSession) fCtx.getExternalContext().getSession(true); // String sessionId = session.getId(); fCtx.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO,"Info: ", getUsername()+", "+getPassword()+", ")); return "start.xhtml"; } public void setUsername(String username) { this.username = username; } public String getUsername() { return username; } public void setPassword(String password) { this.password = password; } public String getPassword() { return password; } } 

Error Stack Trace

 05.01.2011 15:24:00 com.sun.faces.application.ActionListenerImpl processAction SCHWERWIEGEND: java.lang.IllegalStateException javax.faces.el.EvaluationException: java.lang.IllegalStateException at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:98) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:98) at javax.faces.component.UICommand.broadcast(UICommand.java:311) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:781) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1246) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:308) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.IllegalStateException at com.sun.faces.context.FacesContextImpl.assertNotReleased(FacesContextImpl.java:635) at com.sun.faces.context.FacesContextImpl.addMessage(FacesContextImpl.java:471) at org.dhbw.stg.wwi2008c.mopro.ui.managedBeans.Login.login(Login.java:24) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.el.parser.AstValue.invoke(AstValue.java:262) at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:102) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:84) ... 23 more 05.01.2011 15:24:00 com.sun.faces.lifecycle.InvokeApplicationPhase execute WARNUNG: #{login.login}: java.lang.IllegalStateException javax.faces.FacesException: #{login.login}: java.lang.IllegalStateException at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:114) at javax.faces.component.UICommand.broadcast(UICommand.java:311) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:781) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1246) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:308) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: javax.faces.el.EvaluationException: java.lang.IllegalStateException at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:98) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:98) ... 22 more Caused by: java.lang.IllegalStateException at com.sun.faces.context.FacesContextImpl.assertNotReleased(FacesContextImpl.java:635) at com.sun.faces.context.FacesContextImpl.addMessage(FacesContextImpl.java:471) at org.dhbw.stg.wwi2008c.mopro.ui.managedBeans.Login.login(Login.java:24) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.el.parser.AstValue.invoke(AstValue.java:262) at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:102) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:84) ... 23 more javax.faces.FacesException: #{login.login}: java.lang.IllegalStateException at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:85) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:308) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: javax.faces.FacesException: #{login.login}: java.lang.IllegalStateException at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:114) at javax.faces.component.UICommand.broadcast(UICommand.java:311) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:781) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1246) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77) ... 18 more Caused by: javax.faces.el.EvaluationException: java.lang.IllegalStateException at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:98) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:98) ... 22 more Caused by: java.lang.IllegalStateException at com.sun.faces.context.FacesContextImpl.assertNotReleased(FacesContextImpl.java:635) at com.sun.faces.context.FacesContextImpl.addMessage(FacesContextImpl.java:471) at org.dhbw.stg.wwi2008c.mopro.ui.managedBeans.Login.login(Login.java:24) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.el.parser.AstValue.invoke(AstValue.java:262) at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:102) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:84) ... 23 more 

有什么问题我该如何解决？

Answer 1

你的错误在这里：

 @ManagedBean @ViewScoped public class Login { private FacesContext fCtx; public Login() { fCtx = FacesContext.getCurrentInstance(); } } 

您不应将FacesContext分配为视图/会话/应用程序作用域托pipebean的实例variables，并将其重用于不同的请求中，因为FacesContext的当前实例与当前请求绑定在一起，从而使其本质上请求作用域（但最好也不要“所以在请求范围的豆，因为风格不佳，可能会混淆首发）。

FacesContext实例在请求结束时被释放。 在随后的请求中，先前请求中获取的实例已无效。 如果它能够工作，那么ExternalContext上的所有getter方法都会返回前一个HTTP请求的属性（参数，cookie，头文件等），并且所有的setter方法都会被设置为之前已经提交的HTTP响应。 这一切都是不对的。

您应该总是以每个线程本地为基础（即直接在方法块内）获取它。 在你的具体情况下，直接在login()方法中获取它：

 public String login() { FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Info: ", getUsername() + ", " + getPassword() + ", ")); return "start.xhtml"; }