[jboss-jira] [JBoss JIRA] Created: (JBSEAM-335) NullPointerException if user quikcly decides to click a different link or button before the page renders

[Keith Naas (JIRA)]

NullPointerException if user quikcly decides to click a different link or button before the page renders
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                 Key: JBSEAM-335
                 URL: http://jira.jboss.com/jira/browse/JBSEAM-335
             Project: JBoss Seam
          Issue Type: Bug
         Environment: Seam 1.0.1.GA. JBoss 4.0.4, Windows XP, Facelets, MyFaces, Hibernate
            Reporter: Keith Naas


When a user is on one of our screens, they can decide to click a link before the next page loads.  Sometimes, when this do this quickly enough, it causes a NullPointerException in Manager.touchConversationStack at line 181.  Somehow, the currentConversationEntry is null and it breaks when it executes getCurrentConversationEntry().touch().  

I tried unsuccessfully to duplicate this scenario on the Hotel and DVD Store demos hosted on JBoss.  

Stack Trace

java.lang.NullPointerException
	at org.jboss.seam.core.Manager.touchConversationStack(Manager.java:181)
	at org.jboss.seam.core.Manager.storeConversation(Manager.java:368)
	at org.jboss.seam.jsf.AbstractSeamPhaseListener.storeAnyConversationContext(AbstractSeamPhaseListener.java:69)
	at org.jboss.seam.jsf.SeamStateManager.saveSerializedView(SeamStateManager.java:45)
	at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:578)
	at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
.....

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