[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-4130) NullPointerException is thrown after redirect from exception handler for ViewExpiredException to any view with a component with @In or @RequestParameter

[Bostjan Lah (JIRA)]

NullPointerException is thrown after redirect from exception handler for ViewExpiredException to any view with a component with @In or @RequestParameter
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                 Key: JBSEAM-4130
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-4130
             Project: Seam
          Issue Type: Bug
          Components: Exception Handling
    Affects Versions: 2.1.1.GA
         Environment: Seam 2.1.1.GA, Jboss As 4.2.3, Java 1.6
            Reporter: Bostjan Lah


I have the following in my pages.xml:
    <exception class="javax.faces.application.ViewExpiredException">
        <end-conversation/>
        <redirect view-id="/content.xhtml">
            <message>Your session has expired.</message>
        </redirect>
    </exception>

However content.xhtml uses a component ContentHome which has several @RequestParameter annotations.
Here is stacktrace:
java.lang.NullPointerException
	at org.jboss.seam.navigation.Pages.getStringValuesFromModel(Pages.java:758)
	at org.jboss.seam.navigation.Pages.encodePageParameters(Pages.java:937)
	at org.jboss.seam.faces.FacesManager.redirect(FacesManager.java:176)
	at org.jboss.seam.faces.Navigator.redirect(Navigator.java:55)
	at org.jboss.seam.faces.Navigator.redirect(Navigator.java:42)
	at org.jboss.seam.exception.RedirectHandler.handle(RedirectHandler.java:51)
	at org.jboss.seam.exception.Exceptions.handle(Exceptions.java:76)
	at org.jboss.seam.web.ExceptionFilter.endWebRequestAfterException(ExceptionFilter.java:114)
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:70)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)
	at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
	at java.lang.Thread.run(Thread.java:619)

It seems this is caused by trying to retrieve page parameter from page context which doesn't exist at that point.
  

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