[jboss-user] [Beginners Corner] - Application gives exception when left idle for a few hours

[sultan.noori]

Hi,

We have been facing an exception for some time now where an exception is raised at the time of login if the application is left idle for a few hours.  This especially happens if the JBoss AS 3.2.7 is left running over night.  The next day, on login attempt the following exception is raised

Caused by: javax.faces.FacesException: #{index.validateUser}: javax.faces.el.EvaluationException: java.lang.NullPointerException
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:78)
        at com.sun.rave.web.ui.appbase.faces.ActionListenerImpl.processAction(ActionListenerImpl.java:57)
        at javax.faces.component.UICommand.broadcast(UICommand.java:312)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:266)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:380)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
        ... 37 more
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
        at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:130)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
        ... 45 more
Caused by: java.lang.NullPointerException
        at com.tabaq.edocument.login.jsf.LoginValidator.validateUserPassword(LoginValidator.java:110)
        at edocument.index.validateFields(index.java:480)
        at edocument.index.validateUser(index.java:437)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

We have not been able to narrow down the root cause of this problem.  I am also not sure of the exact time period which causes problem.  

I will appreciate if someone can help me find a solution to this.

Thanks in advance.

regards,

Sultan

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