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https://issues.apache.org/jira/browse/MYFACES-3189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054930#comment-13054930
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Martin Kočí commented on MYFACES-3189:
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NavigationHandlerImpl.getNavigationCase already provides a info "No navigation
case match for viewId ..." but it is not sufficient in this situation because
it creates a facesMessage - but there is no view for rendering.
> NavigationHandler: navigation to nonexistent view after ViewExpired throws NPE
> ------------------------------------------------------------------------------
>
> Key: MYFACES-3189
> URL: https://issues.apache.org/jira/browse/MYFACES-3189
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.0.8-SNAPSHOT, 2.1.2-SNAPSHOT
> Reporter: Martin Kočí
>
> see
> http://weblogs.java.net/blog/edburns/archive/2009/09/03/dealing-gracefully-viewexpiredexception-jsf2
> If user provides nonexistent viewId, NPE occurs: MYFACES-3188
> navigation in this situation leads to facesContext.viewRoot = null. I don't
> know what spec says about it but mojarra stays on current view in this case
> (navigate?) - on that view, where VVE is.
> We should also provide a warning about this situation.
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