[英]JSF 2.2 java.lang.IllegalStateException: Cannot create a session after the response has been committed
I've developed web apps using JSF 2.0 and now I decided to write app using Myfaces 2.2 and Tomcat 7.0.35 . 我已经使用JSF 2.0开发了Web应用程序,现在我决定使用Myfaces 2.2和Tomcat 7.0.35编写应用程序。 But I get exceptions and can't understand the reason of this. 但是我有例外,无法理解其原因。 I khow that stacktrace very similar to Mojara bug but I use Myfaces. 我知道该堆栈跟踪与Mojara错误非常相似,但是我使用Myfaces。
java.lang.IllegalStateException: Cannot create a session after the response has been committed
org.apache.catalina.connector.Request.doGetSession(Request.java:2881)
org.apache.catalina.connector.Request.getSession(Request.java:2316)
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:898)
org.apache.myfaces.context.servlet.ServletExternalContextImpl.getSession(ServletExternalContextImpl.java:150)
org.apache.myfaces.view.impl.DefaultViewScopeHandler.generateViewScopeId(DefaultViewScopeHandler.java:128)
org.apache.myfaces.view.ViewScopeProxyMap.getWrapped(ViewScopeProxyMap.java:76)
org.apache.myfaces.view.ViewScopeProxyMap.isEmpty(ViewScopeProxyMap.java:94)
org.apache.myfaces.renderkit.ErrorPageWriter._writeVariables(ErrorPageWriter.java:787)
org.apache.myfaces.renderkit.ErrorPageWriter._writeVariables(ErrorPageWriter.java:769)
org.apache.myfaces.renderkit.ErrorPageWriter.debugHtml(ErrorPageWriter.java:356)
org.apache.myfaces.renderkit.ErrorPageWriter.handle(ErrorPageWriter.java:470)
org.apache.myfaces.context.MyFacesExceptionHandlerWrapperImpl.handle(MyFacesExceptionHandlerWrapperImpl.java:301)
javax.faces.context.ExceptionHandlerWrapper.handle(ExceptionHandlerWrapper.java:61)
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:287)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:200)
It's my page 这是我的页面
<h:body>
<h:inputText value="#{loginBean.userName}"/>
<h:inputSecret value="#{loginBean.password}"/>
<h:commandButton value="Login"/>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<h:outputScript name="lib/bootstrap.min.js" library="js" target="body"/>
</h:body>
@ManagedBean(name = "loginBean")
@RequestScoped
public class LoginBean implements Serializable{
private String userName;
private String password;
@PostConstruct
public void init(){
userName = "";
password = "";
}
public void validateCredentials(){
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
What can be the reason of this problem? 这个问题可能是什么原因?
Try to add: 尝试添加:
<h:form rendered="#{loginBean.initOk}">
<h:inputText value="#{loginBean.userName}"/>
<h:inputSecret value="#{loginBean.password}"/>
<h:commandButton value="Login"/>
............
<h:from>
@ManagedBean(name = "loginBean")
@RequestScoped
public class LoginBean implements Serializable{
private String userName;
private String password;
private boolean initOk;
@PostConstruct
public void init(){
userName = "";
password = "";
initOk =true;
}
all getter setter...
I have the same problem with my ConversationScoped bean. 我的ConversationScoped bean存在相同的问题。 I´m working with jboss AS 7.1 and jsf 2. 我正在使用jboss AS 7.1和jsf 2。
The following is my stacktrace: 以下是我的堆栈跟踪:
15:38:01,911 Information [javax.enterprise.resource.webcontainer.jsf.context] (http-localhost-127.0.0.1-8080-1) Exception when handling error trying to reset the response.: java.lang.IllegalStateException: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2636) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.Request.getSession(Request.java:2375) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:841) [jbossweb-7.0.13.Final.jar:]
at
then I add the next method: 然后我添加下一个方法:
@PostConstruct
public void postConstruct() {
FacesContext.getCurrentInstance().getExternalContext().getSession(true);
}
and the issue is no more. 问题不复存在了。
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