Session don�t work in JSF

Question

Hi, i have created a simple web application with a login form using JSF.
I use Eclipse 3.31, and use the webcontainer of Sun GlassFish V2.
When i want to store a session value in my login method using
FacesContext.getCurrentInstance().getExternalContext().getSessionMap().put(KEY, value);
Then a Null Pointer Exception is thrown, cause getSessionMap always returns NULL!
Here is my faces-config.xml
<managed-bean>
<managed-bean-name>uctl</managed-bean-name>
<managed-bean-class>demo.UserController</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<managed-bean>
<managed-bean-name>user</managed-bean-name>
<managed-bean-class>entity.User</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>What is goind wrong here? Do i need to configure session support in glassfish�s server settings?
Thanks in advance,
markus_down

Answer 1

You were right, session map is not null, but invoking this call throws a NPE.
I call the method from my doLogin() method in my bean class, which is the action method for my command button to login.
I�m using the JSF 1.2 RI, which was shipped with NetBeans 6.0.1.
Here is the full stacktrace:
[#|2008-03-09T12:45:32.265+0100|SEVERE|sun-appserver9.1|javax.enterprise.system.container.web|_ThreadID=20;_ThreadName=httpSSLWorkerThread-8080-0;_RequestID=499c3d3b-eb2a-4696-a7e2-ca9b6209d720;|StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
javax.faces.FacesException: #{bean.doLogin}: java.lang.NullPointerException
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
     at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
     at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
     at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
     at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
     at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
     at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
     at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
     at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
     at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
     at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
     ... 40 more
Caused by: java.lang.NullPointerException
     at com.sun.faces.context.SessionMap.put(ExternalContextImpl.java:968)
     at demo.Bean.doLogin(Bean.java:55)
     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 com.sun.el.parser.AstValue.invoke(AstValue.java:187)
     at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
     ... 41 more
|#]