Seam version 1.0.1
I just had an NPE in my site. The page almost always works, so this is hard to reproduce. The use case is this:
Web page with a conversation that has two IFRAME references. These IFRAMES contain the same JSF page URL but two difference parameters of what to load.
Using the @RequestParameter, I load the data for each IFRAME. This IFRAME JSF page is backed by a CONVERSATION state bean. That way the parent page, and each IFRAME all have different instances of the backing bean and don't collide.
Here is the exception:
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:471) at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138) ...
<iframe src="#{osu:getActionUrl( '/pages/liveReport/viewReportInFrame.xhtml')}?reportName=#{ value.itemInfo.item.name}&appSet=#{webPageView.appSet}" style="width: 100%; height: 100%; border-width: 0px;"> </iframe>
This was already fixed in CVS. It was a concurrency problem.