com.sun.faces.context.FacesContextImpl.assertNotReleased的java.lang.IllegalStateException [英] java.lang.IllegalStateException at com.sun.faces.context.FacesContextImpl.assertNotReleased
本文介绍了com.sun.faces.context.FacesContextImpl.assertNotReleased的java.lang.IllegalStateException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如果我按下提交"按钮，则会在服务器日志中抛出错误消息
If I press the submit` button error messages are thrown at server log
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?
What's the problem how can I fix it?
推荐答案
您的错误在这里:
@ManagedBean
@ViewScoped
public class Login {
private FacesContext fCtx;
public Login() {
fCtx = FacesContext.getCurrentInstance();
}
}
您应该从不将FacesContext分配为视图/会话/应用程序范围内的受管Bean的实例变量，并在不同的请求中重用它，因为FacesContext的当前实例与当前的请求，使其固有地在请求范围内(但最好也不要在请求范围内的Bean中，因为样式较差，可能会使初学者感到困惑).
You should never assign FacesContext as instance variable of a view/session/application scoped managed bean and reuse it in different requests, because the current instance of the FacesContext is tied to the current request which makes it inherently request scoped (but preferably also don't so in request scoped beans because of poor style which may be confusing to starters).
FacesContext实例在请求结束时释放.在后续请求中，在先前请求中获得的实例不再有效.如果可行，则ExternalContext上的所有getter方法都将向您返回先前HTTP请求的属性(参数，cookie，标头等)，以及将设置为先前已提交的先前HTTP响应的所有setter方法.长.这一切都是不对的.
The FacesContext instance is released by end of request. In subsequent requests, the instance obtained in a previous request isn't valid anymore. If it would have worked, then all getter methods on ExternalContext would have returned you the properties (parameters, cookies, headers, etc) of a previous HTTP request and all setter methods whould set to a previous HTTP response which was already committed for long. This all just isn't right.
您应该始终在每个线程的本地基础上获取它(即直接在方法块内部).在您的特定情况下，只需直接在login()方法中获取它即可:
You should always obtain it on a per thread local basis (i.e. straight inside the method block). In your specific case, just obtain it straight inside the login() method:
public String login() {
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Info: ", getUsername() + ", " + getPassword() + ", "));
return "start.xhtml";
}
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